公_英制外螺纹(内螺纹常用规格极限尺寸表与计算

公制螺纹/英制螺纹规格一览表发布时间：10-06-21 来源：点击量：5424 字段选择：大中小2009-10-9外螺纹大径（单位mm）－－－－－－－－－－－－－－－－-内螺纹小径（单位mm）－－－－－－－－－－－－－－－－-序号规格型号最大最小公差最大最小公差1M10*19.9749.7940.1809.1578.9170.240 2M12*1.511.96811.7320.23610.67610.3760.300 3M14*1.513.96813.7320.23612.67612.3760.300 4M16*1.515.96815.7320.23614.67614.3760.300 5M18*1.517.96817.7320.23616.67616.3760.300 6M20*1.519.96819.7320.23618.67618.3760.300 7M22*1.521.96821.7320.23620.67620.3760.300 8M24*1.523.96823.7320.23622.67622.3760.300 9M26*1.525.96825.7320.23624.67624.3760.300 10M27*1.526.96826.7320.23625.67625.3760.300 11M30*1.529.96829.7320.23628.67628.3760.300 12M27*226.96226.6820.28025.21024.8350.375 13M30*229.96229.6820.28028.21027.8350.375 14M33*232.96232.6820.28031.21030.8350.375 15M36*235.96235.6820.28034.21033.8350.375 16M42*241.96241.6820.28040.21039.8350.375英制螺纹规格一览表外螺纹大径（单位mm）内螺纹小径（单位mm）序号规格型号最大最小公差最大最小公差1G1/8-289.7289.5140.2148.8488.5660.282 2G1/4-1913.15712.9070.25011.89011.4450.445 3G3/8-1916.66216.4120.25015.39514.9500.445 4G1/2-1420.95520.6710.28419.17218.6310.541 5G3/4-1426.44126.1570.28424.65824.1170.541 6G1-1133.24932.8890.36030.93130.2910.640 7G11/4-1141.91041.5500.36039.59238.9520.640 8G11/2-1147.80347.4430.36045.48544.8450.640类别标准名称标准号普通螺纹普通螺纹基本牙型GB/T192 —1981普通螺纹直径与螺距系列GB/T193 —1981普通螺纹基本尺寸GB/T196 —1981普通螺纹公差与配合GB/T197 —1981普通螺纹偏差表GB/T2516 —1981商品紧固件的普通螺纹选用系列JB/T7912 —1999商品紧固件的中等精度普通螺纹极限尺寸GB/T9145 —1988光学螺纹光学仪器特种细牙螺纹ZBN30006—1988光学仪器用目镜螺纹JB/T8204—1995光学仪器用短牙螺纹JB/T5450-1991紧配合螺纹过渡配合螺纹GB/T1167—1996过盈配合螺纹GB/T1181—1998小螺纹小螺纹牙型GB/T1505 4.1—1994 小螺纹直径与螺距系列GB/T1505 4.2—1994小螺纹基本尺寸GB/T1505 4.3—1994小螺纹公差GB/T15054.4-1994小螺纹极限尺寸GB/T15054.5-1994MJ螺纹MJ螺纹基本牙型GJB/T3.1 —1982 MJ螺纹螺栓与螺母螺纹的尺寸与公差GJB/T3.2 —1982MJ螺纹管路件螺纹的尺寸与公差GJB/T3.3 —1985MJ螺纹结构件的尺寸与公差GJB/T3.4 —1985MJ螺纹计算公式GJB/T3.5 —1985MJ螺纹首尾GJB52-1985梯形螺纹梯形螺纹牙型GB/T5796 .1—1986 梯形螺纹直径与螺距系列GB/T5796 .2—1986梯形螺纹基本尺寸GB/T5796 .3—1986梯形螺纹公差GB/T5796 .4—1986梯形螺纹极限尺寸GB/T12359—1990机床梯形螺纹丝杠、螺母技术条件JB/T2886—1992锻钢阀门用短牙梯形螺纹JB/TQ374—1985锯齿形螺纹锯齿形(3 °、30°)螺纹牙型GB/T13576.1—1992锯齿形(3 °、30°)螺纹直径与螺距系列GB/T13576.2—1992锯齿形(3 °、30°)螺纹基本尺寸GB/T13576.3—1992锯齿形(3 °、30°)螺纹公差GB/T13576.4—1992水压机45 °锯齿形螺纹牙型与基本尺寸JB2076—1984管螺纹用螺纹密封的管螺纹GB/T7306 —1987 非螺纹密封的管螺纹GB/T7307 —198760°圆锥管螺纹GB/T12716—1991米制锥螺纹GB/T1415—1992管路旋入端用普通螺纹尺寸系列GB/T1414—1978气瓶专用螺纹GB/T8335-1998通用基准螺纹术语GB/T1479 1—1993公制粗螺纹标准公制细螺纹标准规格标准径最大最小规格标准径最大最小规格标准径最大最小M1.0*0.25 0.75 0.785 0.729 M1.0*0.2 0.8 0.821 0.783 M15*1.0 14 14.353 13.917 M1.1*0.25 0.85 0.885 0.829 M1.1*0.2 0.9 0.921 0.883 M16*1.5 14.5 14.676 14.376 M1.2*0.25 0.95 0.985 0.929 M1.2*0.2 1 1.021 0.983 M16*1.0 15 15.153 14.917 M1.4*0.3 1.1 1.142 1.075 M1.4*0.2 1.2 1.221 1.183 M17*1.5 15.5 15.676 15.376 M1.6*0.35 1.25 1.321 1.221 M1.6*0.2 1.4 1.421 1.383 M17*1.0 16 16.153 15.917 M1.7*0.35 1.35 1.421 1.321 M1.7*0.2 1.45 1.5 1.46 M18*2.0 16 16.21 15.835 M1.8*0.35 1.45 1.521 1.421 M1.8*0.2 1.6 1.621 1.583 M18*1.5 16.5 16.676 16.376 M2.0*0.4 1.6 1.679 1.567 M2.0*0.25 1.75 1.785 1.729 M18*1.0 17 17.153 16.917 M2.2*0.45 1.75 1.888 1.713 M2.2*0.25 1.95 1.985 1.929 M20*2.0 18 18.21 17.835 M2.3*0.4 1.9 1.979 1.867 M2.3*0.25 2.05 2.061 2.001 M20*1.5 18.5 18.676 18.376 M2.5*0.45 2.1 2.138 2.013 M2.5*0.35 2.2 2.221 2.121 M20*1.0 19 19.153 18.917 M2.6*0.45 2.2 2.238 2.113 M2.5*0.35 2.2 2.246 2.186 M22*2.0 20 20.21 19.835 M3.0*0.5 2.5 2.599 2.459 M3.0*0.35 2.7 2.721 2.621 M22*1.5 20.5 20.676 20.376 M3.0*0.6 2.4 2.44 2.28 M3.5*0.35 3.2 3.221 3.121 22*1.0 21 21.153 20.917 M3.5*0.6 2.9 3.01 2.85 M4.0*0.5 3.5 3.599 3.459 M24*2.0 22 22.21 21.835 M4.0*0.7 3.8 3.422 3.242 M4.5*0.5 4 4.099 3.959 M24*1.5 22.5 22.676 22.376M4.0*0.75 3.25 3.326 3.106 M5.0*0.5 4.5 4.599 4.459 M24*1.0 23 23.153 22.917 M4.5*0.7 3.8 3.878 3.688 M5.5*0.5 5 5.099 4.959 M25*2.0 23 23.21 22.835 M5*0.8 4.2 4.334 4.134 M6.0*0.75 5.3 5.378 5.188 M25*1.5 23.5 23.676 23.376 M5*0.9 4.1 4.17 3.98 M6.0*0.5 5.5 5.55 5.4 M25*1.0 24 24.153 23.917 M6*1.0 5 5.153 4.917 M7.0*0.75 6.3 6.378 6.188 M26*1.5 24.5 24.676 24.876 M7*1.0 6 6.153 5.917 M7.0*0.5 6.5 6.55 6.4 M27*2.0 25 25.21 24.735 M8*1.25 6.8 6.912 6.647 M8.0*1 7 7.153 6.917 M27*1.5 25.5 25.676 25.376 M9*1.25 7.8 7.912 7.647 M8.0*0.75 7.3 7.378 7.188 M27*1.0 26 26.153 25.735 M10*1.5 8.5 8.676 8.376 M8.0*0.5 7.5 7.52 7.4 M28*2.0 26 26.21 25.835 M11*1.5 9.5 9.676 9.376 M9.0*1 8 8.153 7.917 M28*1.5 26 26.676 26.376 M12*1.75 10.3 10.24 10.11 M9.0*0.75 8.3 8.378 8.188 M28*1.0 27 27.153 26.917 M14*2.0 12 12.21 11.84 M10*1.25 8.8 8.912 8.647 M30*3.0 27 27.252 26.752 M16*2.0 14 14.21 13.84 M10*1.0 9 9.153 8.917 M30*2.0 28 28.21 27.835 M18*2.5 15.5 15.744 15.29 M10*0.75 9.3 9.378 9.188 M30*1.0 28 28.676 28.376 M20*2.5 17.5 17.744 17.29 M10*0.5 9.5 9.52 9.4 M32*2.0 30 29.153 28.917 M22*2.5 19.5 19.744 19.29 M11*1.0 10 10.15 9.917 M32*1.5 30 30.21 29.835 M24*3.0 21 21.252 20.75 M11*0.75 10.3 10.38 10.19 M33*3.0 30 30.676 30.376 M27*3.0 24 24.252 23.75 M12*1.5 10.5 10.68 10.38 M33*2.0 31 30.252 29.752 M30*3.5 26.5 26.771 26.21 M12*1.25 10.8 10.91 10.65 M33*1.5 31.5 31.21 30.835M12*1 11 11.15 10.92 M35*1.5 33.5 33.676 31.376M12*0.5 11.5 11.52 11.4 M36*3.0 33 33.252 32.752M14*0.5 12.5 12.68 12.38 M36*2.0 34 34.21 33.835M14*1.0 13 13.15 12.92 M36*1.5 34 34.676 34.376M15*1.50 13.5 13.68 13.38美制细螺纹标准公制迫牙丝攻钻孔径规格(丝牙外径）标准径最大最小规格精度等级7－G8 1.25 1.305 1.182 G4－G6 G7－G8 G9 NO.1-72(1.854) 1.55 1.612 1.474 M1.0*0.25 0.86 0.88 NO.2-64(2.134) 1.85 1.912 1.756 M1.1*0.25 0.96 0.98 NO.3-56(2.515) 2.1 2.197 2.025 M1.2*0.25 1.06 1.08 NO.4-48(2.345) 2.4 2.456 2.271 M1.4*0.3 1.24 1.25 NO.5-44(3.175) 2.7 2.74 2.551 M1.6*0.35 1.41 1.43 NO.6-40(3.505) 2.9 3.022 2.82 M1.7*0.35 1.51 1.53 NO.8-36(4.166) 3.5 3.606 3.404 M1.8*0.35 1.61 1.63NO.10-32(4.326) 4.1 4.165 3.963 M2.0*0.4 1.78 1.8NO.12-28(5.846) 4.6 4.724 4.496 M2.2*0.45 1.95 1.981\4-28 5.5 5.588 5.36 M2.3*0.4 2.08 2.15\16-24 6.9 7.035 6.782 M2.5*0.45 2.25 2.283\8-24 8.5 8.636 8.382 M2.6*0.45 2.35 2.387\16-20 9.9 10.033 9.729 M3.0*0.5 2.73 2.751\2-20 11.5 11.607 11.329 M3.5*0.6 3.17 3.29\16-18 12.9 13.081 12.751 M4.0*0.7 3.62 3.65 3.69 5\8-18 14.5 14.681 14.351 M5.0*0.8 4.56 4.6 4.64 3\4-16 17.5 17.678 17.323 M6.0*1.0 5.45 5.5 5.55 7\8-14 20.5 20.675 20.27 M7.0*1.0 6.45 6.5 6.55 1\8-12 23.2 23.571 23.114 M8.0*1.25 7.31 7.38 7.44 1-1\8-12 26.5 26.746 26.289 M10*1.5 9.18 9.25 9.32 1-1\4-12 29.5 29.921 29.464 M10*1.25 9.31 9.38 9.44 1-3\8-12 32 33.096 32.639 M12*1.75 11.04 11.12 11.21 1-1\2-12 36 36.271 35.814 M12*1.25 11.31 11.38 11.44英美联合螺纹标准英美联细螺纹标准规格钻头径2B螺纹径规格钻头径下孔径上限下限上限下限NO.1-64UNC 1.55 1.582 1.425 no.0-80unf 1.25 1.305 1.182 NO.2-56UNC 1.8 1.871 1.695 no.1-72unf 1.55 1.612 1.474 NO.3-48UNC 2.1 2.146 1.941 no.2-64-unf 1.85 1.912 1.756 NO.4-40UNC 2.3 2.385 2.157 no.3-565unf 2.1 2.197 2.025 NO.5-40UNC 2.6 2.679 2.487 no.4-48unf 2.4 2.458 2.271 NO.6-32UNC 2.8 2.895 2.642 no.5-44unf 2.7 2.74 2.551 NO.832UNC 3.4 3.53 3.302 no.6-40unf 2.9 3.022 2.82 NO.10-24UNC 3.9 3.926 3.683 no.8-36unf 3.5 3.606 3.404 NO.12-24UNC 4.5 4.597 4.344 no.10-32unf 4.1 4.165 3.963 1\4-20UNC 5.1 5.257 4..979 no.12-28unf 4.6 4.724 4.496 5\16-18unc 6.6 6.731 6.401 1\4-28unf 5.5 5.588 5.363\8-16UNC 8 8.153 7.798 5\16-24unf 6.9 7.035 6.782 7\16-14UNC 9.4 9.55 9.144 3\8-24unf 8.5 8.636 8.382 1\2-13UNC 10.8 11.023 10.599 7\16-20unf 9.9 10.033 9.729 9\16-12UNC 12.2 12.446 11.989 1\2-unf 11.5 11.607 11.3295\8-11UNC 13.6 13.868 13.386 9\16-unf 12.9 13.081 12.75 3\4-10UNC 16.5 16.84 16.307 5\8-18unf 14.5 14.681 14.35 7\8-9UNC 19.5 19.761 19.177 3\4-16unf 17.5 17.678 17.32 1--8UNC 22.2 22.606 21.971 7\8-14unf 20.5 20.675 20.27 11\8-7UNC 25 25.349 24.813 1--12unf 23.2 23.571 23.11 11\4-7UNC 28.2 28.524 27.813 11\8-12unf 26.5 26.746 26.28 13\8-6UNC 30.8 31.115 30.353 11\4-12unf 29.5 29.921 29.46 11\2-6UNC 34 34.29 33.528 13\8-12unf 32.8 33.096 32.63 13\4-5UNC 39.5 39.827 38.964 11\2-12unf 36 36.271 35.81 2-41\2UNC 45.2 45.593 44.679惠式螺纹标准（旧英制牙）山数节距换算表规格钻头径A例B例山数(25.4) 节数*W1\8-40 2.65 2.6 100 0.254*W5\32-32 3.25 3.2 880 0.317 5*w3\16-24 3..75 3.7 772 0.351 8W1\4-20 5.1 5 64 0.396 9W5\16-18 6.6 5 60 0.423 3W3\8-16 8 6.5 56 0.453 6W7\16-14 9.4 7.9 48 0.529 2W1\2-12 10.7 9.310.5 44 0.577 3W9\16-12 12.3 12 40 0.635W5\8-11 13.7 13.5 36 0.705 6W3\4-10 16.7 16.5 32 0.793 8W7\8-9 19.5 19.3 28 0.907 1W1-8 22.4 22 24 1.058 3W1\8-7 25 24.8 20 1.27W11\4 28.3 28 18 1.411 1W13\8-6 30.5 30.3 16 1.587 5W11\2-6 33.8 33.5 14 1.814 3W15\8-5 36 35.7 13 1.953 8W13\4-5 39.2 39 12 2.116 7W11\8-5 41.8 41.5 11 2.309 1W2-41\2 45 44.7 10 2.54牙套螺纹攻用标准9 2.8222规格钻头径下孔径8 3.175上限下限7 3.6286M3*0.5 3.1 3.2 3.12 6 4.2333M4*0.7 4.2 4.3 4.17 5 5.08M5*0.8 5.2 5.33 5.16 41\2 5.6444M6*1 6.3 6.42 6.25 4 6.35M8*1.25 8.4 8.52 8.31 31\2 7.2571M10*1.5 10.5 10.62 10.37 31\2 7.8154M10*1.25 10.4 10.52 10.31 3 8.4667M10*1 10.3 10.42 10.25 27\8 8.8348M12*1.75 12.5 12.73 12.43 23\4 9.2364M12*1.5 12.5 12.62 12.37 25\8 9.6762M12*1.25 12.5 12.52 12.31 21\2 10.16M14*2 14.5 14.83 14349M14*1.5 14.5 14.62 14.37M16*2 16.5 16.83 16.49M16*1.5 16.5 16.62 16.37M18*2.5 19 19.04 18.58M18*1.5 18.5 18.62 18.37M20*2.5 21 21.04 20.58M20*1.5 20.5 20.62 20.37公制、美制和英制螺纹标准NPT，PT，G 都是管螺纹．NPT 是National (American) Pipe Thread 的缩写，属於美国标准的60 度锥管螺纹，用於北美地区．国家标准可查阅GB/T12716-1991 PT 是Pipe Thread 的缩写，是5 5 度密封圆锥管螺纹，属惠氏螺纹家族，多用於欧洲及英联邦国家．常用於水及煤气管行业，锥度规定为1:16．国家标准可查阅GB/T7306-2000 G 是55 度非螺纹密封管螺纹，属惠氏螺纹家族．标记为G 代表圆柱螺纹．国家标准可查阅GB/T7307-2001 另外螺纹中的1/4、1/2、1/8 标记是指螺纹尺寸的直径，单位是英吋．行内人通常用分来称呼螺纹尺寸，一吋等於8分，1/4 吋就是2分，如此类推．G 好像就是管螺纹的统称(Guan)，55，60度的划分属于功能性的，俗称管圆。

螺纹规格-美制、英制、公制美制细牙UNF 2A 外螺纹大径UNFUN 2B内螺纹小径（UN 、UNF ）序号序号规格型号规格型号最大最大最小最小公差公差最小最小最大最大公差公差1 7/16"-20 11.079 10.874 0.206 9.728 10.033 0.305 2 1/2"-20 12.667 12.461 0.206 11.328 11.608 0.279 3 9/16"-18 14.252 14.031 0.221 12.751 13.081 0.330 4 3/4"-16 19.012 18.773 0.239 17.323 17.678 0.356 5 7/8"-14 22.184 21.923 0.262 20.269 20.676 0.406 6 11/16-12 26.944 26.655 0.290 24.689 25.146 0.457 7 15/16-12 33.294 33.005 0.290 31.039 31.496 0.457 8 15/8-12 41.229 40.940 0.290 38.989 39.446 0.457 9 17/8-12 47.579 47.290 0.290 45.339 45.796 0.457 10 21/2-12 63.452 63.162 0.290 61.214 61.671 0.457 公制细牙 6g 外螺纹大径 6H 内螺纹小径内螺纹小径1 M10*1 9.974 9.794 0.180 8.917 9.157 0.240 2 M12*1.5 11.968 11.732 0.236 10.376 10.676 0.300 3 M14*1.5 13.968 13.732 0.236 12.376 12.676 0.300 4 M16*1.5 15.968 15.732 0.236 14.376 14.676 0.300 5 M18*1.5 17.968 17.732 0.236 16.376 16.676 0.300 6 M20*1.5 19.968 19.732 0.236 18.376 18.676 0.300 7 M22*1.5 21.968 21.732 0.236 20.376 20.676 0.300 8 M24*1.5 23.968 23.732 0.236 22.376 22.676 0.300 9 M26*1.5 25.968 25.732 0.236 24.376 24.676 0.300 10 M27*1.5 26.968 26.732 0.236 25.376 25.676 0.300 11 M30*1.5 29.968 29.732 0.236 28.376 28.676 0.300 12 M27*2 26.962 26.682 0.280 24.835 25.210 0.375 13 M30*2 29.962 29.682 0.280 27.835 28.210 0.375 14 M33*2 32.962 32.682 0.280 30.835 31.210 0.375 15 M36*2 35.962 35.682 0.280 33.835 34.210 0.375 16 M42*2 41.962 41.682 0.280 39.835 40.210 0.375 英制管螺纹英制管螺纹1 G1/8-28 9.728 9.514 0.214 8.566 8.848 0.282 2 G1/4-19 13.157 12.907 0.250 11.445 11.890 0.445 3 G3/8-19 16.662 16.412 0.250 14.950 15.395 0.445 4 G1/2-14 20.955 20.671 0.284 18.631 19.172 0.541 5 G3/4-14 26.441 26.157 0.284 24.117 24.658 0.541 6 G1-11 33.249 32.889 0.360 30.291 30.931 0.640 7 G11/4-11 41.910 41.550 0.360 38.952 39.592 0.640 8 G11/2-11 47.803 47.443 0.360 44.845 45.485 0.640 公制/美制/英制螺纹对照表给大家分享一下A 型美制螺纹（UNF ）常用规格 外螺纹外螺纹内螺纹 -4 9/16"-199/16"-19牙 14.28 14.28 13.0813.08-6 11/16''-16 11/16''-16 17.46 17.46 16.116.1-8 13/16''-16 13/16''-16 20.64 20.64 19.2819.28 -10 1''-14 1''-14 25.40 25.40 23.5723.57-12 1(3/16)''-12 1(3/16)''-12 30.00 30.00 28.3228.32-16 1(7/16)''-12 1(7/16)''-12 36.51 36.51 34.6734.67-20 1(11/16)''-12 1(11/16)''-12 42.86 42.86 41.0241.02C 型JIC37度美制UNF 螺纹常用规格 -4 7/16”-20 7/16”-20 11.11 11.11 10.0310.03 -5 1/2”-20 1/2”-20 12.70 12.70 11.32 11.32-6 9/16”-18 9/16”-18 14.28 14.28 13.0813.08-8 3/4”-16 3/4”-16 19.00 19.00 17.6817.68-10 7/8”-14 7/8”-14 22.22 22.22 20.6820.68-12 1(1/16)"-12 1(1/16)"-12 26.98 26.98 25.1525.15-16 1(5/16)"-12 1(5/16)"-12 33.33 33.33 31.531.5-20 1(5/8)"-12 1(5/8)"-12 41.28 41.28 39.4439.44 -24 1(7/8)"-12 1(7/8)"-12 47.62 47.62 45.845.8-32 2(1/2)"-12 2(1/2)"-12 63.5 63.5 61.67英制圆柱管螺纹（BSPP ）常用规格 -4 1/4”-19 1/4”-19 13.157 13.157 11.55-6 3/8”-19 3/8”-19 16.662 16.662 14.9514.95-8 1/2”-14 1/2”-14 20.955 20.955 18.6318.63 -12 3/4”-14 3/4”-14 26.441 26.441 24.11-16 1”-11 1”-11 33.249 33.249 30.29-20 1(1/4)''-11 1(1/4)''-11 41.91 41.91 38.9538.95英制圆锥管螺纹（BSPT ）常用规格 基面大径基面大径基准距离1/4”-19 1/4”-19 13.157 13.157 663/8”-19 3/8”-19 16.662 16.662 6.46.41/2”-14 1/2”-14 20.955 20.955 8.28.23/4”-14 3/4”-14 26.441 26.441 9.59.51”-11 1”-11 33.249 33.249 10.410.41(1/4)''-11 1(1/4)''-11 41.91 41.91 12.712.7美制圆锥管螺纹（NPT ）1/8”-27 1/8”-27 10.24 10.24 441/4”-18 1/4”-18 13.60 13.60 443/8”-18 3/8”-18 17.04 17.04 4.324.321/2”-14 1/2”-14 21.22 21.22 4.484.483/4”-14 3/4”-14 26.57 26.57 4.754.751”-11(1/2)” 1”-11(1/2)” 33.22 33.22 4.64.61(1/4)”-11.5 1(1/4)”-11.5 41.96 41.96 4.834.83。

英制美制及公制螺纹基本尺寸及公差英制、美制及公制螺纹基本尺寸及公差一、英制圆柱管螺纹BSP BSPP P的基本尺寸及公差（牙形角55o）螺纹代号基本直径内螺纹外螺纹大径中径小径中径公差小径公差A级B级中径公差大径公差中径公差大径公差G1/8″×28 9.728 9.147 8.566 +0.170 +0.282-0.107-0.214-0.214-0.214G1/4″×19 13.157 12.301 11.445 +0.125 +0.445 -0.125 -0.250 -0.250 0-0.250G3/8″×19 16.662 15.806 14.950 +0.125+0.445-0.125-0.250-0.250-0.250G1/2″×14 20.955 19.793 18.631 +0.142+0.541-0.142-0.284-0.284-0.284G5/8″×14 22.911 21.749 20.587 +0.142+0.541-0.284-0.284-0.284G3/4″×14 26.441 25.279 24.117 +0.142 +0.541-0.142-0.284-0.284-0.284G1″×11 33.249 31.770 30.291 +0.180+0.640-0.180-0.360-0.360-0.360G1.1/4″×11 41.910 40.431 38.952 +0.180 +0.640-0.180-0.360-0.360-0.360G1.1/2″×11 47.803 46.324 44.854 +0.180 +0.640-0.180-0.360-0.360-0.360G2″×11 59.614 58.135 56.656 +0.180+0.640-0.360-0.360-0.360G2.1/2”X11 75.184 73.705 72.226 +0.217+0.640-0.217-0.434-0.434-0.434G3”X11 87.884 86.405 84.926 +0.217+0.640-0.217-0.434-0.434-0.434G3.1/2”X11 100.330 98.851 97.372 +0.217+0.640-0.217-0.434-0.434-0.434二、英制圆锥管螺纹（BSPTBSPTBSPT）的基本尺寸及公差（牙形角55o）螺纹代号基面上的直径基准长度有效螺纹长度圆锥内螺纹基面轴向位移偏差（±mm）大径中径小径基本最大最小基本最大最小R1/8″×28 9.728 9.147 8.566 4.0 4.9 3.1 6.5 7.4 5.6 1.1R1/4″×19 13.157 12.301 11.445 6.0 7.3 4.7 9.7 11.0 8.4 1.7 R3/8″×19 16.662 15.806 14.950 6.4 7.7 5.1 10.1 11.4 8.8 1.7 R1/2″×14 20.955 19.793 18.631 8.2 10.0 6.4 13.2 15.0 11.4 2.3 R3/4″×14 26.441 25.279 24.117 9.5 11.3 7.7 14.5 16.3 12.7 2.3 R1″×11 33.249 31.770 30.291 10.4 12.7 8.1 16.8 19.1 14.5 2.9 R1.1/4″×11 41.910 40.431 38.952 12.7 15.0 10.4 19.1 21.4 16.8 2.9 R1.1/2″×11 47.803 46.324 44.845 12.7 15.0 10.4 19.1 21.4 16.8 2.9 R2″×11 59.614 58.135 56.656 15.9 18.2 13.6 23.4 25.7 21.1 2.9 R2.1/2”X11 75.184 73.705 72.226 17.5 21.0 14.0 26.7 30.2 23.2 3.5 R3”X11 87.884 86.405 84.926 20.6 24.1 17.1 29.8 33.3 26.3 3.5 R3.1/2”X11 100.330 98.851 97.372 22.2 25.7 18.7 31.4 34.927.9 3.5三、美制管螺纹（UN(F)UN(F)UN(F)）基本尺寸及公差（牙形角60o）螺纹代号外螺纹内螺纹公差等级公差等级2A 2B大径中径小径小径中径大径最大最小最大最小最小最大最小最大JIC螺纹7/16″×20UNF 11.079 10.874 10.254 10.147 9.568 9.72810.033 10.287 10.424 11.113 1/2″×20UNF 12.667 12.461 11.84111.732 11.156 11.328 11.608 11.875 12.017 12.7 9/16″×18UNF 14.252 14.031 13.335 13.221 12.573 12.751 13.081 13.371 13.52 14.288 3/4″×16UNF 19.012 18.773 17.981 17.854 17.12 17.323 17.678 18.019 18.184 19.05 7/8″×14UNF 22.184 21.923 21.006 20.869 20.025 20.269 20.676 21.046 21.224 22.225 1-1/16″×12UN 26.944 26.655 25.57 25.425 24.425 24.689 25.146 25.613 25.801 26.988 1-5/16″×12UN 33.294 33.005 31.92 31.77330.775 31.039 31.496 31.963 32.154 33.338 1-5/8″×12UN 41.229 40.94 39.885 39.705 38.71 38.989 39.446 39.901 40.094 41.275 1-7/8″×12UN 47.579 47.29 46.205 46.053 45.06 45.339 45.796 46.251 46.449 47.625 2-1/2″×12UN 63.452 63.162 62.078 61.92 60.932 61.214 61.671 62.126 62.332 63.5ORFS螺纹9/16″×18UNF 14.252 14.031 13.335 13.221 12.573 12.751 13.081 13.371 13.52 14.288 11/16″×16UN 17.427 17.188 16.396 16.274 15.535 15.748 16.104 16.431 16.589 17.463 13/16″×16UN 20.599 20.361 19.568 19.444 18.707 18.923 19.279 19.606 19.766 20.638 1″×14UNF 25.357 25.095 24.178 24.036 23.195 23.444 23.825 24.221 24.407 25.4 1-3/16″×12UN 30.119 29.83 28.745 28.598 27.6 27.864 28.321 28.788 28.979 30.163 1-7/16″×12UN 36.467 36.177 35.093 34.943 33.947 34.214 34.671 35.138 35.331 36.513 1-11/16″×12UN 42.817 42.527 41.443 41.29 40.297 40.564 41.021 41.488 41.686 42.863 2″×12UN 50.754 50.465 49.38 49.225 48.235 48.514 48.971 49.426 49.627 50.8SAE螺纹5/8″×18UNF 15.839 15.618 14.923 14.803 14.161 14.351 14.681 14.958 15.11 15.875 1-1/16″×14UN 26.947 26.683 25.743 25.608 24.74 24.968 25.375 25.783 25.961 26.987其它美制螺纹9/16″×16UN 14.252 14.013 13.221 13.101 12.36 12.573 12.929 13.256 13.411 14.288 7/8″×12UN 22.182 21.892 20.808 20.668 19.662 19.939 20.396 20.851 21.034 22.225 2-1/4″×12UN 57.104 56.815 55.73 55.575 54.585 54.864 55.321 55.776 55.976 57.15 注：UNC粗牙螺纹系列，UNF细牙螺纹系列，UNEF超细牙螺纹系列，UN不变螺距系列四、布锥管螺纹（NPTNPTNPT）基本尺寸及公差(牙形角60o)螺纹代号基面上的直径螺纹长度大径中径小径有效长度管端至基面长Z1/8″×27 10.272 9.519 8.766 7 4.572 Z1/4″×18 13.572 12.443 11.314 9.5 5.080 Z3/8″×18 17.055 15.926 14.797 10.5 6.096 Z1/2″×14 21.223 19.772 18.321 13.5 8.028 Z3/4″×14 26.568 25.117 23.666 14 8.611 Z1″×11.5 33.228 31.461 29.694 17.5 10.160 Z1.1/4″×11.5 41.985 40.218 38.451 18 10.688 Z1.1/2″×11.5 48.054 46.287 44.520 18.5 10.688 Z2″×11.5 60.09258.325 56.558 19 11.074五、公制螺纹基本尺寸及公差(牙形角60o)螺纹代号基本直径内螺纹外螺纹大径中径小径公差等级公差等级6H 7H 6g中径公差小径公差中径公差小径公差中径公差大径公差M10X1 10 9.350 8.917 +0.150+0.236+0.190+0.300-0.026-0.138-0.026-0.206M12X1 12 11.350 10.917 +0.160+0.236+0.200+0.300-0.144-0.026-0.206M14X1 14 13.350 12.917 +0.160 +0.236+0.200+0.300-0.026-0.144-0.026-0.206M12X1.25 12 11.188 10.647 +0.180 +0.265+0.224+0.335-0.028-0.160-0.028-0.240M14X1.25 14 13.188 12.647 +0.180 +0.265+0.224+0.335-0.028-0.160-0.028-0.240M12X1.5 12 11.026 10.376 +0.190 +0.300+0.375-0.032-0.172-0.032-0.268M14X1.5 14 13.026 12.376 +0.190 +0.300+0.236+0.375-0.032-0.172-0.032-0.268M16X1.5 16 15.026 14.376 +0.190 +0.300+0.236+0.375-0.032-0.172-0.032-0.268M18X1.5 18 17.026 16.373 +0.190 +0.300+0.236+0.375-0.032-0.172-0.032-0.268M20X1.5 20 19.026 18.376 +0.190 +0.300+0.236+0.375-0.032-0.172-0.032-0.268M22X1.5 22 21.026 20.376 +0.190 +0.300+0.236+0.375-0.032-0.172-0.032-0.268M24X1.5 24 23.026 22.376 +0.200 +0.300+0.250+0.375-0.032-0.182-0.032-0.268M26X1.5 26 25.026 24.376 +0.200 +0.300+0.250+0.375-0.032-0.182-0.032-0.268M27X1.5 27 26.026 25.376 +0.200 +0.300+0.250+0.375-0.032-0.182-0.032-0.268M30X1.5 30 29.026 28.376 +0.200 +0.300+0.250+0.375-0.032-0.182-0.032-0.268M33X1.5 33 32.026 31.376 +0.200 +0.300+0.250+0.375-0.032-0.182-0.032-0.268M36X1.5 36 35.026 34.376 +0.200 +0.300+0.250+0.375-0.182-0.032-0.268M39X1.5 39 38.026 37.376 +0.200 +0.300+0.250+0.375-0.032-0.182-0.032-0.268M42X1.5 42 41.026 40.376 +0.200 +0.300+0.250+0.375-0.032-0.182-0.032-0.268M27X2 27 25.701 24.835 +0.224 +0.375+0.280+0.475-0.038-0.208-0.038-0.318M30X2 30 28.701 27.835 +0.224 +0.375+0.475-0.038-0.208-0.038-0.318M33X2 33 31.701 30.835 +0.224 +0.375+0.280+0.475-0.038-0.208-0.038-0.318M36X2 36 34.701 33.835 +0.224 +0.375+0.280+0.475-0.038-0.208-0.038-0.318M39X2 39 37.701 36.835 +0.224 +0.375+0.280+0.475-0.038-0.208-0.038-0.318M42X2 42 40.701 39.835 +0.224 +0.375+0.280+0.475-0.038-0.208-0.038-0.318M45X2 45 43.701 42.835 +0.224 +0.375+0.280+0.475-0.038-0.208-0.038-0.318M52X2 52 50.701 49.835 +0.236 +0.375+0.300+0.475-0.038-0.218-0.038-0.318M60X2 60 58.701 57.835 +0.236 +0.375+0.300+0.475-0.038-0.218-0.038-0.318M64X2 64 62.701 61.835 +0.236 +0.375+0.300+0.475-0.038-0.218-0.038-0.318M72X2 72 70.701 69.835 +0.236 +0.375+0.300+0.475-0.038-0.218-0.038-0.318。

公制内螺纹(6H)常用规格极限尺寸表(粗牙)公制外螺纹(6g)常用规格极限尺寸表(细牙)公制外螺纹(6g)常用规格极限尺寸表(粗牙)垫圈材料的选择在螺纹紧固件中因螺栓、螺钉、螺母的支承面不可能做得很大（受材料与工艺的限制），为减小承压面的压应力，保护被连接件的表面而采用垫圈。

为防止连接副的松动采用防松的弹簧垫圈和多齿形锁紧垫圈、圆螺母止动垫圈以及鞍形、波形、锥形弹性垫圈。

平垫圈主要用于减小压强，当有的部位拧紧轴向力很大时，易使垫圈压成碟形，这时可改用材料和提高硬度来解决。

弹簧垫圈的锁紧效果一般，重要部位尽量少用或不用，而采用自锁结构。

对于用于高速拧紧（气动或电动）的弹簧垫圈，最好采用表面磷化处理的垫圈，提高其减磨性能，否则易摩擦发热而烧坏或张口，甚至损坏被连接件表面。

对于薄板连接处，不应采用弹簧垫圈结构。

据统计，弹簧垫圈在汽车上使用得越来越少了。

齿形弹性垫圈中的连接齿形由于锁紧力大而且均匀，在汽车行业中使用较多，而间隔齿型的则少一些。

对于弹簧垫圈、弹性垫圈，根据国标，一般可选择GB699-1999 《优质碳素结构钢》中的60 、70 钢和65Mn 钢。

我国平垫圈标准共有9项，从2000-2002年分别批准发布了GB/ T97.3－2000、GB/T5286－2001、GB/T95－2002、GB/T96.1－2002、G B/T96.2－2002、GB/T97.1－2002、GB/T97.2－2002、GB/T97.4－20 02及GB/T5287－2002 等平垫圈标准。

根据平垫圈性能等级，作者推荐使用材料：对于100HV级的可选用ST12、ST13及Q235、Q215、Q195等等，表面硬度可达到110HV 左右；对于140HV级的可选用08F、08Al及10、10F等等，表面硬度可达到140HV左右；对于200HV和300HV级的应选用45、50、60、70钢或65Mn钢，可通过热处理淬火回火达到200～300HV和300～400HV技术要求。

公制螺纹/英制螺纹规格一览表公制、美制和英制螺纹标准NPT，PT，G 都是管螺纹．NPT 是National (A merican) Pipe Thread 的缩写，属於美国标准的60 度锥管螺纹，用於北美地区．国家标准可查阅GB/T12716-1991 PT 是Pipe Thread 的缩写，是55 度密封圆锥管螺纹，属惠氏螺纹家族，多用於欧洲及英联邦国家．常用於水及煤气管行业，锥度规定为1:16．国家标准可查阅GB/T7306-2000 G 是55 度非螺纹密封管螺纹，属惠氏螺纹家族．标记为G 代表圆柱螺纹．国家标准可查阅GB/T7307-2001 另外螺纹中的1/4、1/2、1/8 标记是指螺纹尺寸的直径，单位是英吋．行内人通常用分来称呼螺纹尺寸，一吋等於8分，1/4 吋就是2分，如此类推．G 好像就是管螺纹的统称(Guan)，55，60度的划分属于功能性的，俗称管圆。

即螺纹由一圆柱面加工而成。

ZG俗称管锥，即螺纹由一圆锥面加工而成，一般的水管接头都是这样的，老国标标注为Rc ------------------------------------------------------ 公制螺纹用螺距来表示，美英制螺纹用每英寸内的螺纹牙数来表示，这是它们最大的区别，公制螺纹是60度等边牙型，英制螺纹是等腰55度牙型，美制螺纹60度。

公制螺纹用公制单位，美英制螺纹用英制单位。

管螺纹主要用来进行管道的连接，其内外螺纹的配合紧密，有直管与锥管两种。

公称直径是指所连接的管道直径，显然螺纹大径比公称直径大。

1/4，1/2，1/8是英《公制、美制和英制螺纹标准手册》主编：李晓滨，386页，中国标准出版社，2004 本手册具有以下几个特点：①弥补了国内目前缺少汉语版的英制和美制螺纹标准的急需；②本书是按国内技术人员熟悉的螺纹技术体系编写，易于理解及找出英制和美制螺纹与米制螺纹间的差异；③技术内容准确；④螺纹种类齐全，它包含了紧固螺纹、传动螺纹和管螺纹三大类的常用螺纹；⑤附录系统地介绍了各种量具与螺纹要素之间的对应关系，提出了螺纹检测体系概念，为国内技术人员迅速提高螺纹产品质量提供了捷径；⑥附录还提供了世界螺纹识别表，解决了国外螺纹识别困难问题；⑦本书为国内第一本全面、详细地介绍英制、美制和米制螺纹的技术手册。

英制,公制螺纹对照表.尺寸代号每英寸牙数螺距螺纹直径（in) n p 大径D、d 小径D1、d1 1/16 28 0.907 7.723 6.5611/8 28 0.907 9.728 8.5661/4 19 1.337 13.157 11.4453/8 19 1.337 16.662 14.951/2 14 1.814 20.955 18.6315/8 14 1.814 22.911 20.5873/4 14 1.814 26.441 24.1177/8 14 1.814 30.201 27.8771 11 2.309 33.249 30.2911-1/8 11 2.309 37.897 34.9391-1/4 11 2.309 41.91 38.9521-1/2 11 2.309 47.803 44.8451-3/4 11 2.309 53.746 50.7882 11 2.309 59.614 56.6562-1/4 11 2.309 65.71 62.7522-1/2 11 2.309 75.184 72.2262-3/4 11 2.309 81.534 78.5783 11 2.309 87.884 84.9263-1/2 11 2.309 100.33 97.3724 11 2.309 113.03 110.0725 11 2.309 138.43 135.4726 11 2.309 163.83 160.872 注：1in=25.4mm1、用螺纹密封的管螺纹其标记及各种螺纹的特征代号规定如下：Rc—圆锥内螺纹55度Rp—与圆锥外螺纹配合的圆柱内螺纹R—圆锥外螺纹标准规定将螺纹尺寸代号写在特征代号之后，若螺纹为械旋应再加写左旋代号LH，具体示例如下：圆锥内螺纹：Rc1/2左旋圆柱内螺纹：Rp1/2—LH圆柱内螺纹与圆锥外螺纹的配合：Rp2/R2左旋B级外螺纹：G1/2B—LH螺纹副G1/2G1/2A内螺纹：G1/2英制螺纹标准JIS B 0203,JIS B 2301(mm)#0 1.52#1 1.85#2 2.18#3 2.51#4 2.84#5 3.18#6 3.51#7 3.84#8 4.17#10 4.83#12 5.481/4 6.35UNS 是英制普通粗牙螺纹; UNF 是英制航空标示皆将分母为8, 再直接称分子之番号.Ex: 1/8 x 0.50 –PPB: 1 分牙螺丝x 0.50”长, PPBEx: 5/16 x 0.50 –PPB = 2.5/8 x 0.50-PPB : 2 分半牙螺丝x 0. 50”长, PPBEx: 5/32 x 0.50 –PPB =1.25/8 x 0.50-PPB: 1 分2 厘半螺丝x 0. 50”长, PPBEx: 1/4 x 0.50-PPB= 2/8 x 0.50-PPB: 2 分牙螺丝x 0.50”长, PP B注: 有时会标示粗牙或细牙.UNF: 细牙:电子业较常用.UNC:粗牙: 重机械结构较常用.Ex: 3/8 x 0.50 ,UNF –PPB: 3 分细牙螺丝x 0.50”长, PPB.C-2: Length Code:为英寸标示, 须乘以25.40 换算为mm.用扣规量，与公制牙型吻合是公制螺纹，与英制螺纹吻合是英制螺纹。

需要收藏的公制、英制及美制螺纹！螺纹标记（公制、美制和英制）1、公制螺纹标记：1.1标记方法完整的螺纹标记由螺纹特征代号、尺寸代号、公差代号及其他代号组成。

螺纹特征代号用“M”表示。

单线螺纹的尺寸代号为“公称直径╳螺距”，公称直径和螺距数值的单位为毫米。

对粗牙螺纹，可以省略标注其螺距项。

多线螺纹的尺寸代号为“公称直径╳Ph导程、P螺距“、公称直径、导程.和螺距数值的单位为毫米，可以在后面增加括号说明线数(英文)。

公差带代号包含中径和顶径公差带代号, 中径公差带代号在前, 顶径公差带代号在后。

内螺纹用大写字母,外螺纹用小写字母，.如果中径公差带代号和顶径公差带代号相同,则只标注一个公差带代号，.螺纹尺寸代号与公差带间用”━”号分开.大批生产的紧固件螺纹(中等公差精度和中等旋合长度,6H/6g)不标注其公差带代号。

表示螺纹配合时, 内螺纹公差带代号在前, 外螺纹公差带代号在后，中间用斜线分开。

对旋合长度为短组和长组的螺纹，在公差带代号后应分别标注”S”和:”L”代号.旋合长度代号和公差带间用”━”号分开。

中等旋合长度组不标注.旋合长度代号（N）。

左旋螺纹应在旋合长度代号之后标注“LH”代号。

旋合长度代号与旋向代号间用”━”号分开。

右旋螺纹不标注旋向代号。

1.2 标记示例1.2.1普通螺纹特征代号和尺寸代号部分的标注公称直径为8mm、螺距为1mm的单线细牙螺纹：M8×1公称直径为8mm、螺距为1.25mm的单线粗牙螺纹：M8公称直径为16mm、螺距为1.5mm、导程为3mm的双线螺纹：M16×Ph3P1.5或M16×Ph3P1.5（two starts）1.2.2 增加公差带代号后的标注中径公差带为5g、顶径公差带为6g的外螺纹：M10×1-5g6g中径公差带和顶径公差带为6g的粗牙外螺纹：M10-6g中径公差带为5H、顶径公差带为6H的内螺纹：M10×10-5H6H 中径公差带和顶径公差带为6H的粗牙内螺纹：M10-6H中径公差带和顶径公差带均为6g、中等公差径精度的粗牙外螺纹：M10中径公差带和顶径公差带均为6g、中等公差径精度的粗牙内螺纹：M10公差带为6H的内螺纹与公差带为5g6g外螺纹组成配合：M20×2-6H/5g6g公差带为6H的内螺纹与公差带为6g的外螺纹组成配合（中等精度、粗牙）：M201.2.3增加旋合长度代号后的标注短旋合长度的内螺纹：M20×2-5H-S长旋合长度的内、外螺纹：M6-7H/7g6g-L中等旋合长度的外螺纹（粗牙、中等精度的6g公差带）：M61.2.4 增加旋向代号后的标注（完整标注）左旋螺纹：M8×1-LH（公差带代号和旋合长度代号被省略）M6×0.75-5h6h-S-LHM14×Ph6P2-L-LH 或M14×Ph6P2（three starts）-L-LH右旋螺纹：M6（螺距、公差带代号和旋向代号被省略）2、美制统一螺纹标注2.1美制统一螺纹的基本标记对标准系列、标准旋合长度和标准公差的统一螺纹，其标记包含五项基本内容。

公制螺纹/英制螺纹规格一览表发布时间：10-06-21 来源：点击量：5424 字段选择：大中小2009-10-9外螺纹大径（单位mm）－－－－－－－－－－－－－－－－-内螺纹小径（单位mm）－－－－－－－－－－－－－－－－-序号规格型号最大最小公差最大最小公差1M10*19.9749.7940.1809.1578.9170.240 2M12*1.511.96811.7320.23610.67610.3760.300 3M14*1.513.96813.7320.23612.67612.3760.300 4M16*1.515.96815.7320.23614.67614.3760.300 5M18*1.517.96817.7320.23616.67616.3760.300 6M20*1.519.96819.7320.23618.67618.3760.300 7M22*1.521.96821.7320.23620.67620.3760.300 8M24*1.523.96823.7320.23622.67622.3760.300 9M26*1.525.96825.7320.23624.67624.3760.300 10M27*1.526.96826.7320.23625.67625.3760.300 11M30*1.529.96829.7320.23628.67628.3760.300 12M27*226.96226.6820.28025.21024.8350.375 13M30*229.96229.6820.28028.21027.8350.375 14M33*232.96232.6820.28031.21030.8350.375 15M36*235.96235.6820.28034.21033.8350.375 16M42*241.96241.6820.28040.21039.8350.375英制螺纹规格一览表外螺纹大径（单位mm）内螺纹小径（单位mm）序号规格型号最大最小公差最大最小公差1G1/8-289.7289.5140.2148.8488.5660.282 2G1/4-1913.15712.9070.25011.89011.4450.445 3G3/8-1916.66216.4120.25015.39514.9500.445 4G1/2-1420.95520.6710.28419.17218.6310.541 5G3/4-1426.44126.1570.28424.65824.1170.541 6G1-1133.24932.8890.36030.93130.2910.640 7G11/4-1141.91041.5500.36039.59238.9520.640 8G11/2-1147.80347.4430.36045.48544.8450.640类别标准名称标准号普通螺纹普通螺纹基本牙型GB/T192 —1981普通螺纹直径与螺距系列GB/T193 —1981普通螺纹基本尺寸GB/T196 —1981普通螺纹公差与配合GB/T197 —1981普通螺纹偏差表GB/T2516 —1981商品紧固件的普通螺纹选用系列JB/T7912 —1999商品紧固件的中等精度普通螺纹极限尺寸GB/T9145 —1988光学螺纹光学仪器特种细牙螺纹ZBN30006—1988光学仪器用目镜螺纹JB/T8204—1995光学仪器用短牙螺纹JB/T5450-1991紧配合螺纹过渡配合螺纹GB/T1167—1996过盈配合螺纹GB/T1181—1998小螺纹小螺纹牙型GB/T1505 4.1—1994 小螺纹直径与螺距系列GB/T1505 4.2—1994小螺纹基本尺寸GB/T1505 4.3—1994小螺纹公差GB/T15054.4-1994小螺纹极限尺寸GB/T15054.5-1994MJ螺纹MJ螺纹基本牙型GJB/T3.1 —1982 MJ螺纹螺栓与螺母螺纹的尺寸与公差GJB/T3.2 —1982MJ螺纹管路件螺纹的尺寸与公差GJB/T3.3 —1985MJ螺纹结构件的尺寸与公差GJB/T3.4 —1985MJ螺纹计算公式GJB/T3.5 —1985MJ螺纹首尾GJB52-1985梯形螺纹梯形螺纹牙型GB/T5796 .1—1986 梯形螺纹直径与螺距系列GB/T5796 .2—1986梯形螺纹基本尺寸GB/T5796 .3—1986梯形螺纹公差GB/T5796 .4—1986梯形螺纹极限尺寸GB/T12359—1990机床梯形螺纹丝杠、螺母技术条件JB/T2886—1992锻钢阀门用短牙梯形螺纹JB/TQ374—1985锯齿形螺纹锯齿形(3 °、30°)螺纹牙型GB/T13576.1—1992锯齿形(3 °、30°)螺纹直径与螺距系列GB/T13576.2—1992锯齿形(3 °、30°)螺纹基本尺寸GB/T13576.3—1992锯齿形(3 °、30°)螺纹公差GB/T13576.4—1992水压机45 °锯齿形螺纹牙型与基本尺寸JB2076—1984管螺纹用螺纹密封的管螺纹GB/T7306 —1987 非螺纹密封的管螺纹GB/T7307 —198760°圆锥管螺纹GB/T12716—1991米制锥螺纹GB/T1415—1992管路旋入端用普通螺纹尺寸系列GB/T1414—1978气瓶专用螺纹GB/T8335-1998通用基准螺纹术语GB/T1479 1—1993公制粗螺纹标准公制细螺纹标准规格标准径最大最小规格标准径最大最小规格标准径最大最小M1.0*0.25 0.75 0.785 0.729 M1.0*0.2 0.8 0.821 0.783 M15*1.0 14 14.353 13.917 M1.1*0.25 0.85 0.885 0.829 M1.1*0.2 0.9 0.921 0.883 M16*1.5 14.5 14.676 14.376 M1.2*0.25 0.95 0.985 0.929 M1.2*0.2 1 1.021 0.983 M16*1.0 15 15.153 14.917 M1.4*0.3 1.1 1.142 1.075 M1.4*0.2 1.2 1.221 1.183 M17*1.5 15.5 15.676 15.376 M1.6*0.35 1.25 1.321 1.221 M1.6*0.2 1.4 1.421 1.383 M17*1.0 16 16.153 15.917 M1.7*0.35 1.35 1.421 1.321 M1.7*0.2 1.45 1.5 1.46 M18*2.0 16 16.21 15.835 M1.8*0.35 1.45 1.521 1.421 M1.8*0.2 1.6 1.621 1.583 M18*1.5 16.5 16.676 16.376 M2.0*0.4 1.6 1.679 1.567 M2.0*0.25 1.75 1.785 1.729 M18*1.0 17 17.153 16.917 M2.2*0.45 1.75 1.888 1.713 M2.2*0.25 1.95 1.985 1.929 M20*2.0 18 18.21 17.835 M2.3*0.4 1.9 1.979 1.867 M2.3*0.25 2.05 2.061 2.001 M20*1.5 18.5 18.676 18.376 M2.5*0.45 2.1 2.138 2.013 M2.5*0.35 2.2 2.221 2.121 M20*1.0 19 19.153 18.917 M2.6*0.45 2.2 2.238 2.113 M2.5*0.35 2.2 2.246 2.186 M22*2.0 20 20.21 19.835 M3.0*0.5 2.5 2.599 2.459 M3.0*0.35 2.7 2.721 2.621 M22*1.5 20.5 20.676 20.376 M3.0*0.6 2.4 2.44 2.28 M3.5*0.35 3.2 3.221 3.121 22*1.0 21 21.153 20.917 M3.5*0.6 2.9 3.01 2.85 M4.0*0.5 3.5 3.599 3.459 M24*2.0 22 22.21 21.835 M4.0*0.7 3.8 3.422 3.242 M4.5*0.5 4 4.099 3.959 M24*1.5 22.5 22.676 22.376M4.0*0.75 3.25 3.326 3.106 M5.0*0.5 4.5 4.599 4.459 M24*1.0 23 23.153 22.917 M4.5*0.7 3.8 3.878 3.688 M5.5*0.5 5 5.099 4.959 M25*2.0 23 23.21 22.835 M5*0.8 4.2 4.334 4.134 M6.0*0.75 5.3 5.378 5.188 M25*1.5 23.5 23.676 23.376 M5*0.9 4.1 4.17 3.98 M6.0*0.5 5.5 5.55 5.4 M25*1.0 24 24.153 23.917 M6*1.0 5 5.153 4.917 M7.0*0.75 6.3 6.378 6.188 M26*1.5 24.5 24.676 24.876 M7*1.0 6 6.153 5.917 M7.0*0.5 6.5 6.55 6.4 M27*2.0 25 25.21 24.735 M8*1.25 6.8 6.912 6.647 M8.0*1 7 7.153 6.917 M27*1.5 25.5 25.676 25.376 M9*1.25 7.8 7.912 7.647 M8.0*0.75 7.3 7.378 7.188 M27*1.0 26 26.153 25.735 M10*1.5 8.5 8.676 8.376 M8.0*0.5 7.5 7.52 7.4 M28*2.0 26 26.21 25.835 M11*1.5 9.5 9.676 9.376 M9.0*1 8 8.153 7.917 M28*1.5 26 26.676 26.376 M12*1.75 10.3 10.24 10.11 M9.0*0.75 8.3 8.378 8.188 M28*1.0 27 27.153 26.917 M14*2.0 12 12.21 11.84 M10*1.25 8.8 8.912 8.647 M30*3.0 27 27.252 26.752 M16*2.0 14 14.21 13.84 M10*1.0 9 9.153 8.917 M30*2.0 28 28.21 27.835 M18*2.5 15.5 15.744 15.29 M10*0.75 9.3 9.378 9.188 M30*1.0 28 28.676 28.376 M20*2.5 17.5 17.744 17.29 M10*0.5 9.5 9.52 9.4 M32*2.0 30 29.153 28.917 M22*2.5 19.5 19.744 19.29 M11*1.0 10 10.15 9.917 M32*1.5 30 30.21 29.835 M24*3.0 21 21.252 20.75 M11*0.75 10.3 10.38 10.19 M33*3.0 30 30.676 30.376 M27*3.0 24 24.252 23.75 M12*1.5 10.5 10.68 10.38 M33*2.0 31 30.252 29.752 M30*3.5 26.5 26.771 26.21 M12*1.25 10.8 10.91 10.65 M33*1.5 31.5 31.21 30.835M12*1 11 11.15 10.92 M35*1.5 33.5 33.676 31.376M12*0.5 11.5 11.52 11.4 M36*3.0 33 33.252 32.752M14*0.5 12.5 12.68 12.38 M36*2.0 34 34.21 33.835M14*1.0 13 13.15 12.92 M36*1.5 34 34.676 34.376M15*1.50 13.5 13.68 13.38美制细螺纹标准公制迫牙丝攻钻孔径规格(丝牙外径）标准径最大最小规格精度等级7－G8 1.25 1.305 1.182 G4－G6 G7－G8 G9 NO.1-72(1.854) 1.55 1.612 1.474 M1.0*0.25 0.86 0.88 NO.2-64(2.134) 1.85 1.912 1.756 M1.1*0.25 0.96 0.98 NO.3-56(2.515) 2.1 2.197 2.025 M1.2*0.25 1.06 1.08 NO.4-48(2.345) 2.4 2.456 2.271 M1.4*0.3 1.24 1.25 NO.5-44(3.175) 2.7 2.74 2.551 M1.6*0.35 1.41 1.43 NO.6-40(3.505) 2.9 3.022 2.82 M1.7*0.35 1.51 1.53 NO.8-36(4.166) 3.5 3.606 3.404 M1.8*0.35 1.61 1.63NO.10-32(4.326) 4.1 4.165 3.963 M2.0*0.4 1.78 1.8NO.12-28(5.846) 4.6 4.724 4.496 M2.2*0.45 1.95 1.981\4-28 5.5 5.588 5.36 M2.3*0.4 2.08 2.15\16-24 6.9 7.035 6.782 M2.5*0.45 2.25 2.283\8-24 8.5 8.636 8.382 M2.6*0.45 2.35 2.387\16-20 9.9 10.033 9.729 M3.0*0.5 2.73 2.751\2-20 11.5 11.607 11.329 M3.5*0.6 3.17 3.29\16-18 12.9 13.081 12.751 M4.0*0.7 3.62 3.65 3.69 5\8-18 14.5 14.681 14.351 M5.0*0.8 4.56 4.6 4.64 3\4-16 17.5 17.678 17.323 M6.0*1.0 5.45 5.5 5.55 7\8-14 20.5 20.675 20.27 M7.0*1.0 6.45 6.5 6.55 1\8-12 23.2 23.571 23.114 M8.0*1.25 7.31 7.38 7.44 1-1\8-12 26.5 26.746 26.289 M10*1.5 9.18 9.25 9.32 1-1\4-12 29.5 29.921 29.464 M10*1.25 9.31 9.38 9.44 1-3\8-12 32 33.096 32.639 M12*1.75 11.04 11.12 11.21 1-1\2-12 36 36.271 35.814 M12*1.25 11.31 11.38 11.44英美联合螺纹标准英美联细螺纹标准规格钻头径2B螺纹径规格钻头径下孔径上限下限上限下限NO.1-64UNC 1.55 1.582 1.425 no.0-80unf 1.25 1.305 1.182 NO.2-56UNC 1.8 1.871 1.695 no.1-72unf 1.55 1.612 1.474 NO.3-48UNC 2.1 2.146 1.941 no.2-64-unf 1.85 1.912 1.756 NO.4-40UNC 2.3 2.385 2.157 no.3-565unf 2.1 2.197 2.025 NO.5-40UNC 2.6 2.679 2.487 no.4-48unf 2.4 2.458 2.271 NO.6-32UNC 2.8 2.895 2.642 no.5-44unf 2.7 2.74 2.551 NO.832UNC 3.4 3.53 3.302 no.6-40unf 2.9 3.022 2.82 NO.10-24UNC 3.9 3.926 3.683 no.8-36unf 3.5 3.606 3.404 NO.12-24UNC 4.5 4.597 4.344 no.10-32unf 4.1 4.165 3.963 1\4-20UNC 5.1 5.257 4..979 no.12-28unf 4.6 4.724 4.496 5\16-18unc 6.6 6.731 6.401 1\4-28unf 5.5 5.588 5.363\8-16UNC 8 8.153 7.798 5\16-24unf 6.9 7.035 6.782 7\16-14UNC 9.4 9.55 9.144 3\8-24unf 8.5 8.636 8.382 1\2-13UNC 10.8 11.023 10.599 7\16-20unf 9.9 10.033 9.729 9\16-12UNC 12.2 12.446 11.989 1\2-unf 11.5 11.607 11.3295\8-11UNC 13.6 13.868 13.386 9\16-unf 12.9 13.081 12.75 3\4-10UNC 16.5 16.84 16.307 5\8-18unf 14.5 14.681 14.35 7\8-9UNC 19.5 19.761 19.177 3\4-16unf 17.5 17.678 17.32 1--8UNC 22.2 22.606 21.971 7\8-14unf 20.5 20.675 20.27 11\8-7UNC 25 25.349 24.813 1--12unf 23.2 23.571 23.11 11\4-7UNC 28.2 28.524 27.813 11\8-12unf 26.5 26.746 26.28 13\8-6UNC 30.8 31.115 30.353 11\4-12unf 29.5 29.921 29.46 11\2-6UNC 34 34.29 33.528 13\8-12unf 32.8 33.096 32.63 13\4-5UNC 39.5 39.827 38.964 11\2-12unf 36 36.271 35.81 2-41\2UNC 45.2 45.593 44.679惠式螺纹标准（旧英制牙）山数节距换算表规格钻头径A例B例山数(25.4) 节数*W1\8-40 2.65 2.6 100 0.254*W5\32-32 3.25 3.2 880 0.317 5*w3\16-24 3..75 3.7 772 0.351 8W1\4-20 5.1 5 64 0.396 9W5\16-18 6.6 5 60 0.423 3W3\8-16 8 6.5 56 0.453 6W7\16-14 9.4 7.9 48 0.529 2W1\2-12 10.7 9.310.5 44 0.577 3W9\16-12 12.3 12 40 0.635W5\8-11 13.7 13.5 36 0.705 6W3\4-10 16.7 16.5 32 0.793 8W7\8-9 19.5 19.3 28 0.907 1W1-8 22.4 22 24 1.058 3W1\8-7 25 24.8 20 1.27W11\4 28.3 28 18 1.411 1W13\8-6 30.5 30.3 16 1.587 5W11\2-6 33.8 33.5 14 1.814 3W15\8-5 36 35.7 13 1.953 8W13\4-5 39.2 39 12 2.116 7W11\8-5 41.8 41.5 11 2.309 1W2-41\2 45 44.7 10 2.54牙套螺纹攻用标准9 2.8222规格钻头径下孔径8 3.175上限下限7 3.6286M3*0.5 3.1 3.2 3.12 6 4.2333M4*0.7 4.2 4.3 4.17 5 5.08M5*0.8 5.2 5.33 5.16 41\2 5.6444M6*1 6.3 6.42 6.25 4 6.35M8*1.25 8.4 8.52 8.31 31\2 7.2571M10*1.5 10.5 10.62 10.37 31\2 7.8154M10*1.25 10.4 10.52 10.31 3 8.4667M10*1 10.3 10.42 10.25 27\8 8.8348M12*1.75 12.5 12.73 12.43 23\4 9.2364M12*1.5 12.5 12.62 12.37 25\8 9.6762M12*1.25 12.5 12.52 12.31 21\2 10.16M14*2 14.5 14.83 14349M14*1.5 14.5 14.62 14.37M16*2 16.5 16.83 16.49M16*1.5 16.5 16.62 16.37M18*2.5 19 19.04 18.58M18*1.5 18.5 18.62 18.37M20*2.5 21 21.04 20.58M20*1.5 20.5 20.62 20.37公制、美制和英制螺纹标准NPT，PT，G 都是管螺纹．NPT 是National (American) Pipe Thread 的缩写，属於美国标准的60 度锥管螺纹，用於北美地区．国家标准可查阅GB/T12716-1991 PT 是Pipe Thread 的缩写，是5 5 度密封圆锥管螺纹，属惠氏螺纹家族，多用於欧洲及英联邦国家．常用於水及煤气管行业，锥度规定为1:16．国家标准可查阅GB/T7306-2000 G 是55 度非螺纹密封管螺纹，属惠氏螺纹家族．标记为G 代表圆柱螺纹．国家标准可查阅GB/T7307-2001 另外螺纹中的1/4、1/2、1/8 标记是指螺纹尺寸的直径，单位是英吋．行内人通常用分来称呼螺纹尺寸，一吋等於8分，1/4 吋就是2分，如此类推．G 好像就是管螺纹的统称(Guan)，55，60度的划分属于功能性的，俗称管圆。

普通的公制、英制、美制螺纹计算公式，附最新英制螺纹对照表公制螺纹(MM牙)牙深=0.6495*牙距P(牙角60度)内牙孔径= 公称直径-1.0825*PM20x2.5-6H/7g (右手)-(单头螺纹)-(公制粗牙)(公称直径20mm) (牙距2.5mm)(内螺纹配合等级6H)(外螺纹配合等级7g)左-双头-M20x1.5 (左手)-(双头螺纹)-(公制细牙)(公称直径20mm) (牙距1.5mm)美制螺纹(统一标准螺纹)牙深= 0.6495*(25.4/每吋牙数)(牙角60度)3/4-10UNC-2A(UNC粗牙)(UNF细牙)(1A 2A 3A 外牙公差配合等级)(1B 2B 3B 内牙公差配合等级)UNC美制统一标准粗牙螺纹外径3/4英吋,每英吋10牙外牙 2级公差配合管螺纹(英制PT)牙深= 0.6403*(25.4/每吋牙数)(牙角55度)PT 3/4-14 (锥度管螺纹) 锥度管螺纹,锥度比1/16 3/4英吋管用,每英吋14牙螺纹(PS直螺纹)(PF细牙)牙深= 0.6403*(25.4/每吋牙数)(牙角55度)PS 3/4-14 (直形管螺纹)PF1 1/8-16 (直形管螺纹)(细牙)直形管螺纹3/4英吋管用,每英吋14牙1 1/8英吋管用,每英吋16牙管螺纹(美制NPT)(牙角60度)NPT 3/4-14 (锥形管螺纹) 锥形管螺纹,锥度比1/16 3/4英吋管用,每英吋14牙梯形螺纹(30度公制)TM40*6 公称直径40mm 牙距6.0mm梯形螺纹(29度爱克姆螺纹)TW26*5 外径26mm,每英吋5牙方形螺纹车牙的计算考虑条件计算公式公制牙与英制牙的转换每吋螺纹数 n = 25.4 / 牙距 P牙距 P = 25.4 / 每吋螺纹数 n因为工件材料及刀具所决定的转速转速 N = (1000周速 V ) / (圆周率 p * 直径 D )因为机器结构所决定的转速刀座快速移动的影响车牙最高转速 N = 4000/ P刀座快速移动加减速的影响下刀点与退刀点的计算(不完全牙的计算) 下刀最小距离 L1L1 = (牙距 P ) * (主轴转速 S ) / 500退刀最距离 L2L2 = (牙距 P ) * (主轴转速 S ) / 2000牙深及牙底径d 牙深 h =0.6495 * P牙底径 d =公称外径 D - 2 * h例题：车制外牙3/4'-10UNC 20mm长公制牙与英制牙的转换牙距 P = 25.4 / (吋螺纹数 n)P = 25.4 / 10 = 2.54mm因为工件材料及刀具所决定的转速外径 D = 3 / 4英吋 = 25.4 * (3/4) =19.05MM转速 N = (1000周速V) / (圆周率 p * 直径 D )N = 1000V / pD = 1000 * 120 / (3.1416*19.05)=2005 rpm (转/分)因为机器结构所决定的转速刀座快速移动的影响车牙最高转速 N =4000 / PN = 4000/2.54 = 1575 rpm综合工件材料刀具及机械结构所决定的转速 N = 1575 转N = 2005转两者转速选择较低者,即1575转刀座快速移动加减速的影响下刀点与退刀点的计算(不完全牙的计算) 下刀最小距离 L1L1 = (牙距P) * (主轴转速S) / 500L1 = 2.54*1575/500=8.00mm退刀最小距离 L2L2 = (牙距P) * (主轴转速S) / 2000L2 = 2.54*1575/2000=2.00mm牙深及牙底径d 牙深径d = 公称外径D-2*h =19.05-2*1.65 = 15.75mm附表：英制普通螺纹(惠氏螺纹) -- 小螺纹系列(BA)名义尺寸牙型代号大径螺距每英寸牙数中径小径牙型高底孔直径BA mm mm tpi mm 外螺纹H1 mmd=D p d2=D2 d3No. 14 BA 1 0.23 110.4 0.86 0.72 0.14 0.75 No. 13 BA 1.2 0.25 101.6 1.05 0.9 0.15 0.95 No. 12 BA 1.3 0.28 90.71 1.13 0.96 0.17 1 No. 11 BA 1.5 0.31 81.93 1.315 1.13 0.185 1.2 No. 10 BA 1.7 0.35 72.57 1.49 1.28 0.21 1.35 No. 9 BA 1.9 0.39 65.12 1.665 1.43 0.235 1.5 No. 8 BA 2.2 0.43 59.07 1.94 1.68 0.26 1.8 No. 7 BA 2.5 0.48 52.92 2.21 1.92 0.29 2 No. 6 BA 2.8 0.53 47.92 2.48 2.16 0.32 2.3 No. 5 BA 3.2 0.59 43.05 2.845 2.49 0.355 2.6 No. 4 BA 3.6 0.66 38.48 3.205 2.81 0.395 2.95 No. 3 BA 4.1 0.73 34.79 3.66 3.22 0.44 3.4 No. 2 BA 4.7 0.81 31.35 4.215 3.73 0.485 3.9 No. 1 BA 5.3 0.9 28.22 4.76 4.22 0.54 4.4No. 0 BA 6 1 25.4 5.4 4.8 0.6 5 55°圆锥管螺纹型式和尺寸（2006-03-13 14:38:47 ）螺纹代号基本尺寸大径螺距每英寸牙数中径小径牙型高度圆弧尺寸底英寸mm mm tpi mm 外螺纹H1 r mm d=D p d2=D2 d3R 1/16 1/16＂7.723 0.907 28 7.142 6.561 0.581 0.125 6. R 1/8 1/8＂9.728 0.907 28 9.147 8.566 0.581 0.125 8. R 1/4 1/4＂13.157 1.337 19 12.301 11.445 0.856 0.184 11 R 3/8 3/8＂16.662 1.337 19 15.806 14.95 0.856 0.184 14 R 1/2 1/2＂20.955 1.814 14 19.793 18.631 1.162 0.249 18 R 3/4 3/4＂26.441 1.814 14 25.279 24.117 1.162 0.249 23 R 1 1＂33.249 2.309 11 31.77 30.291 1.479 0.317 30 R 1 1/4 1 1/4＂ 41.91 2.309 11 40.431 38.952 1.479 0.317 38 R 1 1/2 1 1/2＂ 47.803 2.309 11 46.324 44.845 1.479 0.317 44 R 2 2＂59.614 2.309 11 58.135 56.656 1.479 0.317 56 R 2 1/2 2 1/2＂ 75.184 2.309 11 73.705 72.226 1.479 0.317 71 R 3 3＂87.884 2.309 11 86.405 84.926 1.479 0.317 85 R 4 4＂113.03 2.309 11 111.551 110.072 1.479 0.317 11 R 5 5＂138.43 2.309 11 136.951 135.472 1.479 0.317 13 R 6 6＂163.83 2.309 11 162.351 160.872 1.479 0.317 16制惠氏螺纹的型式尺寸英制普通螺纹(惠氏螺纹) -- 粗牙(BSW)名义尺寸牙型代号大径螺距每英寸牙数中径小径牙型高底孔直径Ww mm mm tpi mm 外螺纹H1 mmd=D p d2=D2 d31/16＂BSW 1.587 0.423 60 1.315 1.05 0.27 1.15 3/32＂BSW 2.381 0.529 48 2.041 1.703 0.338 1.9 1/8＂BSW 3.175 0.635 40 2.768 2.362 0.406 2.5 5/32＂BSW 3.969 0.793 32 3.459 2.952 0.507 3.2 3/16＂BSW 4.762 1.058 24 4.084 3.407 0.677 3.7 7/32＂BSW 5.556 1.058 24 4.878 4.201 0.677 4.5 1/4＂BSW 6.35 1.27 20 5.537 4.724 0.813 5.1 5/16＂BSW 7.938 1.411 18 7.034 6.131 0.904 6.53/8＂BSW 9.525 1.588 16 8.509 7.492 1.017 7.9 7/16＂BSW 11.113 1.814 14 9.951 8.789 1.162 9.2 1/2＂BSW 12.7 2.117 12 11.345 9.99 1.355 10.4 5/8＂BSW 15.876 2.309 11 14.397 12.918 1.479 13.4 3/4＂BSW 19.051 2.54 10 17.424 15.798 1.627 16.25 7/8＂BSW 22.226 2.822 9 20.419 18.611 1.807 19.25 1＂BSW 25.4 3.175 8 23.368 21.335 2.033 221 1/8＂BSW 28.576 3.629 7 26.253 23.929 2.324 24.5 1 1/4＂BSW 31.751 3.629 7 29.428 27.104 2.324 27.25 1 3/8＂BSW 34.926 4.233 6 32.215 29.505 2.711 30.25 1 1/2＂BSW 38.1 4.233 6 35.391 32.68 2.711 33.5 1 5/8＂BSW 41.277 5.08 5 38.024 34.771 3.253 35.5 1 3/4＂BSW 44.452 5.08 5 41.199 37.946 3.253 38.5 1 7/8＂BSW 47.627 5.6454 1/2 44.012 40.398 3.614 41.25 2＂BSW 50.802 5.645 4 1/2 47.187 43.573 3.614 44.5 2 1/4＂BSW 57.152 6.35 4 53.086 49.02 4.066 502 1/2＂BSW 63.502 6.35 4 59.436 55.37 4.066 562 3/4＂BSW 69.853 7.257 3 1/2 65.205 60.558 4.647 61.5 3＂BSW 76.203 7.257 3 1/2 71.556 66.909 4.647 683 1/4＂BSW 82.553 7.816 3 1/4 77.548 72.544 5.005 73.75 3 1/2＂BSW 88.903 7.816 3 1/4 83.899 78.894 5.005 803 3/4＂BSW 95.254 8.467 3 89.832 84.41 5.422 85.5 4＂BSW 101.604 8.467 3 96.182 90.76 5.422 924 1/4＂BSW 107.954 8.835 2 7/8 102.297 96.639 5.657 984 1/2＂BSW 114.304 8.835 2 7/8 108.647 102.99 5.657 104.2 4 3/4＂BSW 120.665 9.237 2 3/4 114.74 108.625 5.915 110 5＂BSW 127.005 9.237 2 3/4 121.09 115.176 5.915 116.5 5 1/4＂BSW 133.355 9.677 2 5/8 127.159 120.963 6.196 122.5 5 1/2＂BSW 139.705 9.677 2 5/8 133.509 127.313 6.196 128.5 5 3/4＂BSW 146.055 10.16 2 1/2 139.549 133.043 6.506 134.5 6＂BSW 152.406 10.16 2 1/2 145.9 139.394 6.506 141 英制普通螺纹-- 细牙-- BSF英制普通螺纹(惠氏螺纹) -- 细牙(BSW)名义尺寸牙型代号大径螺距每英寸牙数中径小径牙型高底孔直径BSF mm mm tpi mm 外螺纹H1 mm d=D p d2=D2 d33/16 BSF 4.763 0.794 32 4.255 3.747 0.508 47/32 BSF 5.556 0.907 28 4.975 4.394 0.581 4.6 1/4 BSF 6.35 0.977 26 5.725 5.1 0.625 5.3 9/32 BSF 7.142 0.977 26 6.518 5.893 0.625 6.1 5/16 BSF 7.938 1.156 22 7.199 6.459 0.739 6.8 3/8 BSF 9.525 1.27 20 8.712 7.899 0.813 8.3 7/16 BSF 11.113 1.411 18 10.209 9.304 0.904 9.7 1/2 BSF 12.7 1.588 16 11.684 10.668 1.017 11.1 9/16 BSF 14.288 1.588 16 13.272 12.256 1.017 12.7 5/8 BSF 15.875 1.814 14 14.712 13.549 1.162 1411/16 BSF 17.463 1.814 14 16.3 15.137 1.162 15.5 3/4 BSF 19.05 2.117 12 17.693 16.336 1.355 16.75 13/16 BSF 20.638 2.117 12 19.281 17.924 1.355 18.25 7/8 BSF 22.225 2.309 11 20.747 19.269 1.479 19.75 1.00 BSF 25.4 2.54 10 23.774 22.148 1.627 22.75 1 1/8 BSF 28.575 2.822 9 26.769 24.963 1.807 26.5 1 1/4 BSF 31.75 2.822 9 29.944 28.138 1.807 28.75 1 3/8 BSF 34.925 3.175 8 32.893 30.861 2.033 31.5 1 1/2 BSF 38.1 3.175 8 36.068 34.036 2.033 34.5 1 5/8 BSF 41.275 3.175 8 39.243 37.211 2.033 381 3/4 BSF 44.45 3.629 7 42.126 39.802 2.324 40.52 BSF 50.8 3.629 7 48.476 46.152 2.324 472 1/4 BSF 57.15 4.234 6 54.44 51.73 2.711 532 1/2 BSF 63.5 4.234 6 60.79 58.08 2.711 592 3/4 BSF 69.85 4.234 6 67.14 64.43 2.711 -3 BSF 76.2 5.08 5 72.946 69.692 3.253 -3 1/4 BSF 82.55 5.08 5 79.296 76.042 3.253 -3 1/2 BSF 88.9 5.6454 1/2 85.285 81.67 3.614 -3 3/4 BSF 95.25 5.645 4 1/2 91.635 88.02 3.614 -4 BSF 101.6 5.645 4 1/2 97.985 94.37 3.614 -4 1/4 BSF 107.95 6.35 4 103.886 99.822 4.066 - 55°圆柱管螺纹的型式和尺寸British Pipe Thread (惠氏管螺纹) -- 圆柱(BSPP/BSPF)螺纹代号基本尺寸大径螺距每英寸牙数中径小径牙型高度底孔尺寸mm mm tpi mm 外螺纹H1 mmd=D p d2=D2 d3G 1/8 1/8＂9.728 0.907 28 9.147 8.566 0.581 8.7 G 1/4 1/4＂13.157 1.337 19 12.301 11.445 0.856 11.6 G 3/8 3/8＂16.662 1.337 19 15.806 14.95 0.856 15G 1/2 1/2＂20.955 1.814 14 19.793 18.631 1.162 19G 5/8 5/8＂22.911 1.814 14 21.749 20.587 1.162 20.75 G 3/4 3/4＂26.441 1.814 14 25.279 24.117 1.162 24.5 G 7/8 7/8＂30.201 1.814 14 29.039 27.877 1.162 28G 1 1＂33.249 2.309 11 31.77 30.291 1.479 30.5 G 1 1/8 1 1/8＂ 37.897 2.309 11 36.418 34.939 1.479 35G 1 1/4 1 1/4＂ 41.91 2.309 11 40.431 38.952 1.479 39.5 G 1 3/8 1 3/8＂ 44.323 2.309 11 42.844 41.365 1.479 41.5 G 1 1/2 1 1/2＂ 47.803 2.309 11 46.324 44.845 1.479 45G 1 3/4 1 3/4＂ 53.746 2.309 11 52.267 50.788 1.479 51G 2 2＂59.614 2.309 11 58.135 56.656 1.479 57G 2 1/4 2 1/4＂ 65.71 2.309 11 64.231 62.752 1.479 63G 2 1/2 2 1/2＂ 75.184 2.309 11 73.705 72.226 1.479 72.5 G 2 3/4 2 3/4＂ 81.534 2.309 11 80.055 78.576 1.479 79G 3 3＂87.884 2.309 11 86.405 84.926 1.479 85.5 G 3 1/4 3 1/4＂ 93.98 2.309 11 92.501 91.022 1.479 91G 3 1/2 3 1/2＂ 100.33 2.309 11 98.351 97.372 1.479 97.75 G 3 3/4 3 3/4＂ 106.68 2.309 11 105.201 103.722 1.479 104 G 4 4＂113.03 2.309 11 111.55 110.072 1.479 110.5 G 4 1/2 4 1/2＂ 125.73 2.309 11 124.251 122.772 1.479 123 G 5 5＂138.43 2.309 11 136.951 135.472 1.479 136 G 5 1/2 5 1/2＂ 151.13 2.309 11 149.651 148.172 1.479 148.5 G 6 6＂163.83 2.309 11 162.351 160.872 1.479 161.5RC2英寸锥管螺纹，每英寸11牙，螺距=25.4/11即2.309，牙高（深）=2.309×0.64即1.479，锥度是固定的即1：16R等于1/32乘以长度1/32意思是，锥螺纹的锥度是1：16 ，单边就是1：32长度意思是：定位点加有效长度比如我定位3.0，有效长度是12.0R=1/32 X（3+12）=0.468751、密封管螺纹（R）英制密封管螺纹的基本尺寸及其公差配合方式英制密封管螺纹有两种配合方式：圆柱内螺纹与圆锥外螺纹组成“柱/锥”配合；圆锥内螺纹与圆锥外螺纹组成“锥/锥”配合.欧洲国家主要采用“柱/锥”配合螺纹；而欧洲以外国家则主要采用“柱/锥”配合螺纹.两种螺纹的检验量规存在一定不同；目前的ISO 英制密封管螺纹量规标准（ISO 7-2：2000）是按“柱/锥”配合体系设计的.编辑本段密封管螺纹的标记英制密封管螺纹的完整标记由螺纹特征代号、螺纹尺寸代号和旋向代号组成.英制密封圆柱内螺纹的特征代号为：RP；英制密封圆锥内螺纹的特征代号为：RC；英制密封圆锥外螺纹的特征代号为：R1（与英制密封圆柱内螺纹配合使用）；R2（与英制密封圆锥内螺纹配合使用）；左旋螺纹的旋向代号为LH；右旋螺纹的旋向代号省略不标.对密封管螺纹，利用RP/R1，RC/R2分别表示“柱/锥” 和“锥/锥”螺纹副.2、非密封管螺纹英制非密封管的基本尺寸及其极限偏差标记:英制非密封管螺纹的完整标记由螺纹特征代号，螺纹尺寸代号，中径公差等级代号和旋向代号组成.英制非密封圆柱螺纹的特征代号为：G对英制非密封圆柱内螺纹，其中径公差等级代号省略不标；而英制非密封圆柱外螺纹的中径公尺等级代号分别为A和B.左旋螺纹的旋向代号为LH；右旋螺纹的旋向代号省略不标.当表示英制非密封管螺纹的螺纹副时，仅标注外螺纹的标记代号.示例：尺寸代号为2的右旋，非密封圆柱内螺纹：G2尺寸代号为3的A级，右旋，非密封圆柱外螺纹：G3A尺寸代号为4的B级，左旋，非密封圆柱外螺纹：G4 B-LH尺寸代号为2的右旋，非密封圆柱内螺纹与A级圆柱外螺纹组成的螺纹副：G2A加工内孔螺纹的是管螺纹丝锥加工外螺纹的有板牙。

最大最小最小1最大最小公差范圍最小最大最小最大公差范圍2A 0.00050.05950.0563…0.05140.04960.00180.04462B 0.04650.05140.05190.05420.00230.06003A 0.00000.06000.0568…0.05190.05060.00130.04513B 0.04650.05140.05190.05360.00170.06002A 0.00060.07240.0686…0.06230.06030.00200.05382B 0.05610.06230.06290.06550.00260.07303A 0.00000.07300.0692…0.06290.06140.00150.05443B 0.05610.06230.06290.06480.00190.07302A 0.00060.07240.0689…0.06340.06150.00190.05592B 0.05800.06350.06400.06650.00250.07303A 0.00000.07300.0695…0.06400.06260.00140.05653B 0.05800.06350.06400.06590.00190.07302A 0.00060.08540.0813…0.07380.07170.00210.06422B 0.06670.07370.07440.07720.00280.08603A 0.00000.08600.0819…0.07440.07280.00160.06483B 0.06670.07370.07440.07650.00210.08602A 0.00060.08540.0816…0.07530.07330.00200.06682B 0.06910.07530.07590.07860.00270.08603A 0.00000.08600.0822…0.07590.07440.00150.06743B 0.06910.07530.07590.07790.00200.08602A 0.00070.09830.0938…0.08480.08250.00230.07342B 0.07640.08450.08550.08850.00300.09903A 0.00000.09900.0945…0.08550.08380.00170.07413B 0.07640.08450.08550.08770.00220.09902A 0.00070.09830.0942…0.08670.08450.00220.07712B 0.07970.08650.08740.09020.00280.09903A 0.00000.09900.0949…0.08740.08580.00160.07783B 0.07970.08650.08740.08950.00210.09902A 0.00080.11120.1061…0.09500.09250.00250.08142B 0.08490.09390.09580.09910.00330.11203A 0.00000.11200.1069…0.09580.09390.00190.08223B 0.08490.09390.09580.09820.00240.11202A 0.00070.11130.1068…0.09780.09540.00240.08642B 0.08940.09680.09850.10160.00310.11203A 0.00000.11200.1075…0.09850.09670.00180.08713B 0.08940.09680.09850.10080.00230.11202A 0.00080.12420.1191…0.10800.10540.00260.09442B 0.09790.10620.10880.11210.00330.12503A 0.00000.12500.1199…0.10880.10690.00190.09523B 0.09790.10620.10880.11130.00250.12502A 0.00070.12430.1195…0.10950.10700.00250.09722B 0.10040.10790.11020.11340.00320.12503A 0.00000.12500.1202…0.11020.10830.00190.09793B 0.10040.10790.11020.11260.00240.12502A 0.00080.13720.1312…0.11690.11410.00280.10002B 0.10400.1140.11770.12140.00370.13803A 0.00000.13800.1320…0.11770.11560.00210.10083B 0.10400.11400.11770.12040.00270.13802A 0.00080.13720.1321…0.12100.11840.00260.10742B 0.1110.1190.12180.12520.00340.13803A 0.00000.13800.1329…0.12180.11980.00200.10823B 0.11100.11860.12180.12430.00250.13802A 0.00090.16310.1571…0.14280.13990.00290.12592B 0.1300.1390.14370.14750.00380.16403A 0.00000.16400.1580…0.14370.14150.00220.12683B 0.13000.13890.14370.14650.00280.16402A 0.00080.16320.1577…0.14520.14240.00280.13012B 0.1340.1420.14600.14960.00360.16403A 0.00000.16400.1585…0.14600.14390.00210.13093B0.13400.14160.14600.14870.00270.16406-40/0.138-40UNF 8-32/0.164-32UNC 8-36/0.164-36UNF0-80/0.060-80UNF 1-64/0.073-64UNC 1-72/0.073-72UNF 允許偏差倒2-56/0.086-56UNC 2-64/0.086-64UNF 等級角最小等級5-44/0.125-44UNF 3-48/0.099-48UNC 3-56/0.099-56UNF 4-48/0.112-48UNF 4-40/0.112-40UNC 6-32/0.138-32UNC 5-40/0.125-40UNC最大最小最小1最大最小公差范圍最小最大最小最大公差范圍允許偏差倒等級角最小等級2A 0.00100.18900.1818…0.16190.15860.00330.13942B 0.1450.1560.16290.16720.00430.19003A 0.00000.19000.1828…0.16290.16040.00250.14043B 0.14500.15550.16290.16610.00320.19002A 0.00090.18910.1831…0.16880.16580.00300.15192B 0.1560.1640.16970.17360.00390.19003A 0.00000.19000.1840…0.16970.16740.00230.15283B 0.15600.16410.16970.17260.00290.19002A 0.00100.21500.2078…0.18790.18450.00340.16542B 0.1710.1810.18890.19330.00440.21603A 0.00000.21600.2088…0.18890.18630.00260.16643B 0.17100.18070.18890.19220.00330.21602A 0.00100.21500.2085…0.19180.18860.00320.17242B 0.1770.1860.19280.19700.00420.21603A 0.00000.21600.2095…0.19280.19040.00240.17343B 0.17700.18570.19280.19590.00310.21602A 0.00090.21510.2091…0.19480.19170.00310.17792B 0.1820.1900.19570.19980.00410.21603A 0.00000.21600.2100…0.19570.19330.00240.17883B 0.18200.18950.19570.19880.00310.21601A 0.00110.24890.2367…0.21640.21080.00560.18941B 0.1960.2070.21750.22480.00730.25002A 0.00110.24890.24080.23670.21640.21270.00370.18942B 0.1960.2070.21750.22240.00490.25003A 0.00000.25000.2419…0.21750.21470.00280.19053B 0.19600.20670.21750.22110.00360.25001A 0.00100.24900.2392…0.22580.22080.00500.20641B 0.2110.2200.22680.23330.00650.25002A 0.00100.24900.2425…0.22580.22250.00330.20642B 0.2110.2200.22680.23110.00430.25003A 0.00000.25000.2435…0.22680.22430.00250.20743B 0.21100.21900.22680.23000.00320.25002A 0.00100.24900.2430…0.22870.22550.00320.21182B 0.2160.2240.22970.23390.00420.25003A 0.00000.25000.2440…0.22970.22730.00240.21283B 0.21600.22290.22970.23280.00310.25001A 0.00120.31130.2982…0.27520.26910.00610.24521B 0.2520.2650.27640.28430.00790.31252A 0.00120.31130.30260.29820.27520.27120.00400.24522B 0.2520.2650.27640.28170.00530.31253A 0.00000.31250.3038…0.27640.27340.00300.24643B 0.25200.26300.27640.28030.00390.31252A 0.00120.31130.3032…0.27880.27480.00400.25182B 0.2580.2700.28000.28520.00570.31253A 0.00000.31250.3044…0.28000.27700.00300.25303B 0.25800.26800.28000.28390.00390.31251A 0.00110.31140.3006…0.28430.27880.00550.26181B 0.2670.2770.28540.29250.00710.31252A 0.00110.31140.3042…0.28430.28060.00370.26182B 0.2670.2770.28540.29020.00480.31253A 0.00000.31250.3053…0.28540.28270.00270.26293B 0.26700.27540.28540.28900.00360.31252A 0.00100.31150.3050…0.28830.28490.00340.26892B 0.2740.2820.28930.29370.00440.31253A 0.00000.31250.3060…0.28930.28670.00260.26993B 0.27400.28070.28930.29260.00330.31252A 0.00100.31160.3055…0.29120.28800.00320.27432B 0.2790.2860.29220.29640.00420.31253A 0.00000.31250.3065…0.29220.28980.00240.27533B0.27900.28470.29220.29530.00310.31255/16-32/0.3125-32UNEF5/16-20/0.3125-20UN 5/16-24/0.3125-24UNF 5/16-28/0.3125-28UN1/4-28/0.250-28UNF 1/4-32/0.250-32UNEF 5/16-18/0.3125-18UNC 12-28/0.216-28UNF 12-32/0.216-32UNEF 1/4-20/0.250-20UNC10-24/0.190-24UNC 10-32/0.190-32UNF 12-24/0.216-24UNC最大最小最小1最大最小公差范圍最小最大最小最大公差范圍允許偏差倒等級角最小等級1A 0.00130.37370.3595…0.33310.32660.00650.29921B 0.3070.3210.33440.34290.00850.37502A 0.00130.37370.36430.35950.33310.32870.00440.29922B 0.3070.3210.33440.34010.00570.37503A 0.00000.37500.3656…0.33440.33110.00330.30053B 0.30700.31820.33440.33870.00430.37502A 0.00120.37380.3657…0.34130.33720.00410.31432B 0.3210.3320.34250.34790.00540.37503A 0.00000.37500.3669…0.34250.33940.00310.31553B 0.32100.32970.34250.34650.00400.37501A 0.00110.37390.3631…0.34680.34110.00570.32431B 0.3300.3400.34790.35530.00740.37502A 0.00110.37390.3667…0.34680.34300.00380.32432B 0.3300.3400.34790.35280.00490.37503A 0.00000.37500.3678…0.34790.34500.00290.32543B 0.33000.33720.34790.35160.00370.37502A 0.00110.37390.3674…0.35070.34710.00360.33132B 0.3360.3450.35180.35640.00460.37503A 0.00000.37500.3685…0.35180.34910.00270.33243B 0.33600.34260.35180.35530.00350.37502A 0.00100.37400.3680…0.35370.35030.00340.33682B 0.3410.3490.35470.35910.00440.37503A 0.00000.37500.3690…0.35470.35220.00250.33783B 0.34100.34690.35470.35800.00330.37501A 0.00140.43610.4206…0.38970.38260.00710.35111B 0.3600.3760.39110.40030.00920.43752A 0.00140.43610.42580.42060.38970.38500.00470.35112B 0.3600.3760.39110.39720.00610.43753A 0.00000.43750.4272…0.39110.38760.00350.35253B 0.36000.37170.39110.39570.00460.43752A 0.00140.43610.4267…0.39550.39090.00460.36162B 0.3700.3840.39690.40280.00590.43753A 0.00000.43750.4281…0.39690.39350.00340.36303B 0.37000.38000.39690.40140.00450.43751A 0.00130.43620.4240…0.40370.39750.00620.37671B 0.3830.3950.40500.41310.00810.43752A 0.00130.43620.4281…0.40370.39950.00420.37672B 0.3830.3950.40500.41040.00540.43753A 0.00000.43750.4294…0.40500.40190.00310.37803B 0.38300.39160.40500.40910.00410.43752A 0.00110.43640.4299…0.41320.40960.00360.39382B 0.3990.4070.41430.41890.00460.43753A 0.00000.43760.4310…0.41430.41160.00270.39493B 0.39900.40510.41430.41780.00350.43752A 0.00100.43650.4305…0.41620.41280.00340.39932B 0.4040.4110.41720.42160.00440.43753A 0.00000.43750.4315…0.41720.41470.00250.40033B 0.40400.40940.41720.42050.00330.43751A 0.00150.49850.4822…0.44850.44110.00740.40691B 0.4170.4340.45000.45970.00970.50002A 0.00150.49850.48760.48220.44850.44350.00500.40692B 0.4170.4340.45000.45650.00650.50003A 0.00000.50000.4891…0.45000.44630.00370.40843B 0.41700.42840.45000.45480.00480.50002A 0.00140.49860.4892…0.45800.45330.00470.42412B 0.4320.4460.45940.46550.00610.50003A 0.00000.50000.4906…0.45940.45590.00350.42553B 0.43200.44190.45940.46400.00460.50001A 0.00130.49870.4865…0.46620.45980.00640.43921B 0.4460.4570.46750.47590.00840.50002A 0.00130.49870.4906…0.46620.46190.00430.43922B 0.4460.4570.46750.47310.00560.50003A 0.00000.50000.4919…0.46750.46430.00320.44053B0.44600.45370.46750.47170.00420.50003/8-24/0.375-24UNF 3/8-28/0.375-28UN 3/8-16/0.375-16UNC 3/8-20/0.375-20UN 3/8-32/0.375-32UNEF 7/16-14/0.4375-14UNC 7/16-28/0.4375-28UNEF 7/16-32/0.4375-32UN 7/16-16/0.4375-16UN 7/16-20/0.4375-20UNF1/2-20/0.500-20UNF1/2-13/0.500-13UNC 1/2-16/0.500-16UN最大最小最小1最大最小公差范圍最小最大最小最大公差范圍允許偏差倒等級角最小等級2A 0.00110.49890.4924…0.47570.47200.00370.45632B 0.4610.4700.47680.48160.00480.50003A 0.00000.50000.4935…0.47680.47400.00280.45743B 0.46100.46760.47680.48040.00360.50002A 0.00100.49900.4930…0.47870.47520.00350.46182B 0.4660.4740.47970.48420.00450.50003A 0.00000.50000.4940…0.47970.47710.00260.46283B 0.46600.47190.47970.48310.00340.50001A 0.00160.56090.5437…0.50680.49900.00780.46171B 0.4720.4900.50840.51860.01020.56252A 0.00160.56090.54950.54370.50680.50160.00520.46172B 0.4720.4900.50840.51520.00680.56253A 0.00000.56250.5511…0.50840.50450.00390.46333B 0.47200.48430.50840.51350.00510.56252A 0.00140.56110.5517…0.52050.51580.00470.48662B 0.4950.5090.52190.52800.00610.56253A 0.00000.56250.5531…0.52190.51840.00350.48803B 0.49500.50400.52190.52650.00460.56251A 0.00140.56110.5480…0.52500.51820.00680.49501B 0.5020.5150.52640.53530.00890.56252A 0.00140.56110.5524…0.52500.52050.00450.49502B 0.5020.5150.52640.53230.00590.56253A 0.00000.56250.5538…0.52640.52300.00340.49643B 0.50200.51060.52640.53080.00440.56252A 0.00130.56120.5531…0.52870.52450.00420.50172B 0.5080.5200.53000.53550.00550.56253A 0.00000.56260.5544…0.53000.52680.00320.50303B 0.50800.51620.53000.53410.00410.56252A 0.00120.56130.5541…0.53420.53030.00390.51172B 0.5170.5270.53540.54050.00510.56253A 0.00000.56250.5553…0.53540.53250.00290.51293B 0.5170.52440.53540.53920.00380.56252A 0.00110.56140.5549…0.53820.53450.00370.51882B 0.5240.5320.53930.54410.00480.56253A 0.00000.56250.5560…0.53930.53650.00280.51993B 0.52400.53010.53930.54290.00360.56252A 0.00100.56150.5555…0.54120.53770.00350.52432B 0.5290.5360.54220.54670.00450.56253A 0.00000.56250.5565…0.54220.53960.00260.52533B 0.52900.53440.54220.54560.00340.56251A 0.00160.62340.6052…0.56440.55610.00830.51521B 0.5270.5460.56600.57670.01070.62502A 0.00160.62340.61130.60520.56440.55890.00560.51522B 0.5270.5460.56600.57320.00720.62503A 0.00000.62500.6129…0.56600.56190.00410.51683B 0.52700.53910.56600.57140.00540.62502A 0.00160.62340.6120…0.56930.56390.00540.52422B 0.5350.5530.57090.57800.00710.62503A 0.00000.62500.6136…0.57090.56680.00410.52583B 0.53500.54630.57090.57620.00530.62502A 0.00140.63260.6142…0.58300.57820.00480.54912B 0.5570.5710.58440.59060.00620.62503A 0.00000.62500.6156…0.58440.58080.00360.55053B 0.55700.56620.58440.58900.00460.62501A 0.00140.62360.6105…0.58750.58050.00700.55751B 0.5650.5780.58890.59800.00910.62502A 0.00140.62360.6149…0.58750.58280.00470.55752B 0.5650.5780.58890.59490.00600.62503A 0.00000.62500.6163…0.58890.58540.00350.55893B0.5650.57300.58890.59340.00450.62505/8-18/0.625-18UNF5/8-11/0.625-11UNC 5/8-12/0.625-12UN 5/8-16/0.625-16UN 9/16-24/0.5625-24UNEF 9/16-28/0.5625-28UN 9/16-32/0.5625-32UN 9/16-20/0.5625-20UN1/2-28/0.500-28UNEF 9/16-16/0.5625-16UN 9/16-18/0.5625-18UNF 1/2-32/0.500-32UN 9/16-12/0.5625-12UNC最大最小最小1最大最小公差范圍最小最大最小最大公差范圍允許偏差倒等級角最小等級2A 0.00130.62370.6156…0.59120.58690.00430.56422B 0.5710.5820.59250.59810.00560.62503A 0.00000.62500.6169…0.59250.58930.00320.56553B 0.57100.57870.59250.59670.00420.62502A 0.00120.62380.6166…0.59670.59270.0040057422B 0.5800.5900.59790.60310.00520.62503A 0.00000.62500.6178…0.59790.59490.00300.57543B 0.58000.58690.59790.60180.00390.62502A 0.00110.62390.6174…0.60070.59690.00380.58132B 0.5860.5950.60180.60670.00490.62503A 0.00000.62500.6185…0.60180.59900.00280.58243B 0.58600.59260.60180.60550.00370.62502A 0.00110.62390.6179…0.60360.60000.00360.58672B 0.5910.5900.60470.60930.00460.62503A 0.00000.62500.6190…0.60470.60200.00270.58783B 0.59100.59690.60470.60820.00350.62502A 0.00160.68590.6745…0.63180.62640.00540.58672B 0.5970.6150.63340.64050.00710.68753A 0.00000.68750.6761…0.63340.62930.00410.58833B 0.5970.60850.63340.63870.00530.68752A 0.00140.68610.6767…0.64550.64070.00480.61162B 0.6200.6340.64690.65310.00620.68753A 0.00000.68750.6781…0.64690.64330.00360.61303B 0.62000.62840.64690.65150.00460.68752A 0.00130.68820.6781…0.65370.64940.00430.62672B 0.6330.6450.65500.66060.00560.68753A 0.00000.68750.6794…0.65500.65180.00320.62803B 0.63300.64120.65500.65920.00420.68752A 0.00120.68630.6791…0.65920.65520.00400.63672B 0.6420.6520.66040.66560.00520.68753A 0.00000.68750.6803…0.66040.65740.00300.63793B 0.64200.64940.66040.66430.00390.68752A 0.00110.68640.6799…0.66320.65940.00380.64382B 0.6490.6570.66430.66920.00490.68753A 0.00000.68750.6810…0.66430.66150.00280.64493B 0.64900.65510.66430.66800.00370.68752A 0.00110.68640.6804…0.66610.66250.00380.64922B 0.6540.6610.66720.67180.00460.68753A 0.00000.68750.6815…0.66720.66450.00270.65033B 0.65400.65940.66720.67070.00350.68751A 0.00180.74820.7288…0.68320.67440.00880.62911B 0.6420.6630.68500.69650.01150.75002A 0.00180.74820.73530.72880.68320.67730.00590.62912B 0.6420.6630.68500.69270.00770.75003A 0.00000.75000.7371…0.68500.68060.00440.63093B 0.64200.65450.68500.69070.00570.75002A 0.00170.74830.7369…0.69420.68870.00550.64912B 0.6600.6780.69590.70310.00720.75003A 0.00000.75000.7386…0.69590.69180.00410.65083B 0.66000.67070.69590.70130.00540.75001A 0.00150.74850.7343…0.70790.70040.00750.67401B 0.6820.6960.70940.71920.00980.75002A 0.00150.74850.7391…0.70790.70290.00500.67402B 0.6820.6960.70940.71590.00650.75003A 0.00000.75000.7406…0.70940.70560.00380.67553B 0.68200.69080.70940.71430.00490.75002A 0.00130.74870.7406…0.71620.71180.00440.68922B 0.6960.7070.71750.72320.00570.75003A 0.00000.75000.7419…0.71750.71420.00330.69053B0.69600.70370.71750.72180.00430.75005/8-28/0.625-28UN 5/8-20/0.625-20UN 5/8-24/0.625-24UNEF 11/16-16/0.6875-16UN 11/16-20/0.6875-20UN5/8-32/0.625-32UN 11/16-12/0.6875-12UN 11/16-32/0.6875-32UN 3/4-10/0.750-10UNC 11/16-24/0.6875-24UNEF 11/16-28/0.6875-28UN 3/4-20/0.750-20UN3/4-12/0.750-12UN 3/4-16/0.750-16UNF最大最小最小1最大最小公差范圍最小最大最小最大公差范圍允許偏差倒等級角最小等級2A 0.00120.74880.7423…0.72560.72180.00380.70622B 0.7110.7200.72680.73180.00500.75003A 0.00000.75000.7435…0.72680.72390.00290.70743B 0.71100.71760.72680.73050.00370.75002A 0.00110.74890.7429…0.72860.72500.00360.71172B 0.7160.7240.72970.73440.00470.75003A 0.00000.75000.7440…0.72970.72700.00270.71283B 0.71600.72190.72970.73330.00360.75002A 0.00170.81080.7994…0.75670.75120.00550.71162B 0.7220.7400.75840.76560.00720.81253A 0.00000.81250.8011…0.75840.75430.00410.71333B 0.72200.73290.75840.76380.00540.81252A 0.00150.81100.8016…0.77040.76550.00490.73652B 0.7450.7590.77190.77820.00630.81253A 0.00000.81250.8031…0.77190.76830.00360.73803B 0.74500.75330.77190.77660.00470.81252A 0.00130.81120.8031…0.77870.77430.00440.75172B 0.7580.7700.78000.78570.00570.81253A 0.00000.81250.8044…0.78000.77670.00330.75303B 0.75800.76620.78000.78430.00430.81252A 0.00120.81130.8048…0.78810.78430.00380.76872B 0.7740.7820.78930.79430.00500.81253A 0.00000.81250.8060…0.78930.78640.00290.76993B 0.77400.78010.78930.79300.00370.81252A 0.00110.81140.8054…0.79110.78750.00360.77422B 0.7790.7860.79220.79690.00470.81253A 0.00000.81250.8065…0.79220.78950.00270.77533B 0.77900.78440.79220.79580.00360.81251A 0.00190.87310.8523…0.80090.79140.00950.74081B 0.7550.7780.80280.81510.01230.87502A 0.00190.87310.85920.85230.80090.79460.00630.74082B 0.7550.7780.80280.81100.00820.87503A 0.00000.87500.8611…0.80280.79810.00470.74273B 0.75500.76810.80280.80890.00610.87502A 0.00170.87330.8619…0.81920.81370.00550.77412B 0.7850.8030.82090.82810.00720.87503A 0.00000.87500.8636…0.82090.81680.00410.77583B 0.78500.79480.82090.82630.00540.87501A 0.00160.87340.8579…0.82700.81890.00810.78841B 0.7980.8140.82860.83920.01060.87502A 0.00160.87340.8631…0.82700.82160.00540.78842B 0.7980.8140.82860.83560.00700.87503A 0.00000.87500.8647…0.82860.82450.00410.79003B 0.79800.80680.82860.83390.00530.87502A 0.00150.87350.8641…0.83290.82800.00490.79002B 0.8070.8210.83440.84070.00630.87503A 0.00000.87500.8656…0.83440.83080.00360.80053B 0.80700.81580.83440.83910.00470.87502A 0.00130.87370.8656…0.84120.83680.00440.81422B 0.8210.8320.84250.84820.00570.87503A 0.00000.87500.8669…0.84250.83920.00330.81553B 0.82100.82870.84250.84680.00430.87502A 0.00120.87380.8673…0.85060.84680.00380.83122B 0.8360.8450.85180.85680.00500.87503A 0.00000.87500.8685…0.85180.84890.00290.83243B 0.83600.84260.85180.85550.00370.87502A 0.00110.87390.8679…0.85360.85000.00360.83672B 0.8410.8490.85470.85940.00470.87503A 0.00000.87500.8690…0.85470.85200.00270.83783B0.84100.84690.85470.85830.00360.87507/8-20/0.875-20UNEF 7/8-28/0.875-28UN 7/8-32/0.875-32UN7/8-12/0.875-12UN 7/8-14/0.875-14UNF 7/8-16/0.875-16UN 3/4-28/0.750-28UN 13/16-16/0.8125-16UN13/16-20/0.8125-20UNEF 3/4-32/0.750-32UN 13/16-12/0.8125-12UN 7/8-9/0.875-9UNC 13/16-28/0.8125-28UN 13/16-32/0.8125-32UN最大最小最小1最大最小公差范圍最小最大最小最大公差范圍允許偏差倒等級角最小等級2A 0.00170.93580.9244…0.88170.87600.00570.83662B 0.8470.8650.88340.89080.00740.93753A 0.00000.93750.9261…0.88340.87930.00410.83833B 0.84700.85750.88340.88890.00550.93752A 0.00150.93600.9266…0.89540.89040.00500.86152B 0.8700.8840.89690.90340.00650.93753A 0.00000.93750.9281…0.89690.89320.00370.86303B 0.87000.87830.89690.90180.00490.93752A 0.00140.93610.9280…0.90360.89910.00450.87662B 0.8830.8950.90500.91090.00590.93753A 0.00000.93750.9294…0.90500.90160.00340.87803B 0.88300.89120.90500.90940.00440.93752A 0.00120.93630.9298…0.91310.90910.00400.89372B 0.8990.9070.91430.91950.00520.93753A 0.00000.93750.9310…0.91430.91130.00300.89493B 0.89900.90510.91430.91820.00390.93752A 0.00110.93640.9304…0.91610.91230.00380.89922B 0.9040.9110.91720.92210.00490.93753A 0.00000.93750.9315…0.91720.91440.00280.90033B 0.90400.90940.91720.92090.00370.93751A 0.00200.99800.9755…0.91680.90670.01010.84921B 0.8650.8900.91880.93200.0132 1.00002A 0.00200.99800.98300.97550.91680.91000.00680.84922B 0.8650.8900.91880.92760.0088 1.00003A 0.0000 1.00000.9850…0.91880.91370.00510.85123B 0.86500.87970.91680.92540.0066 1.00001A 0.00180.99820.9810…0.94410.93530.00880.89901B 0.9100.9280.94590.95730.0114 1.00002A 0.00180.99820.9868…0.94410.93820.00590.89902B 0.9100.9280.94590.95350.0076 1.00003A 0.0000 1.00000.9886…0.94590.94150.00440.90083B 0.91000.91980.94590.95160.0057 1.00001A 0.00170.99830.9828…0.95190.94350.00840.91321B 0.9230.9380.95360.96450.0109 1.00002A 0.00170.99830.9880…0.95190.94630.00560.91322B 0.9230.9380.95360.96090.0073 1.00003A 0.0000 1.00000.9897…0.95360.94940.00420.91493B 0.92300.93160.95360.95900.0054 1.00002A 0.00150.99850.9891…0.95790.95290.00500.92402B 0.9320.9460.95940.96590.0065 1.00003A 0.0000 1.00000.9906…0.95940.95570.00370.92553B 0.93200.94080.95940.96430.0049 1.00002A 0.00140.99860.9905…0.96610.96160.00450.93912B 0.9460.9570.96750.97340.0059 1.00003A 0.0000 1.00000.9919…0.96750.96410.00340.94053B 0.94600.95370.96750.97190.0044 1.00002A 0.00120.99880.9923…0.97560.97160.00400.95622B 0.9610.9700.97680.98200.0052 1.00003A 0.0000 1.00000.9935…0.97680.97380.00300.95743B 0.96100.96760.97680.98070.0039 1.00002A 0.00110.99890.9929…0.97860.97480.00380.96172B 0.9660.9740.97970.98460.0049 1.00003A 0.0000 1.00000.9940…0.97970.97690.00280.96283B 0.96600.97190.97970.98340.0037 1.00002A 0.0020 1.06051.0455…0.97930.97250.00680.91172B 0.9270.9520.98130.99020.0089 1.06253A 0.0000 1.06251.0475…0.98130.97620.00510.91373B0.92700.94220.98130.98800.0067 1.06251-1/16-8/1.0625-8UN1-20/1.000-20UNEF1-28/1.000-28UN1-32/1.000-32UN1-12/1.000-12UNF 1-14/1.000-14UNS(5)1-16/1.000-16UN15/16-28/0.9375-28UN15/16-32/0.9375-32UN1-8/1.000-8UNC 15/16-12/0.9375-12UN15/16-16/0.9375-16UN15/16-20/0.9375-20UNEF最大最小最小1最大最小公差范圍最小最大最小最大公差范圍允許偏差倒等級角最小等級2A 0.0017 1.06081.0494… 1.00671.00100.00570.96162B 0.9720.990 1.00841.01580.0074 1.06253A 0.0000 1.06251.0511… 1.00841.00420.00420.96333B 0.97200.98231.00841.01390.0055 1.06252A 0.0015 1.06101.0516… 1.02041.01540.00500.98652B 0.995 1.009 1.02191.02840.0065 1.06253A 0.0000 1.06251.0531… 1.02191.01820.00370.98803B 0.99501.00331.02191.02680.0049 1.06252A 0.0014 1.06111.0524… 1.02501.02030.00470.99502B 1.002 1.015 1.02641.03260.0062 1.06253A 0.0000 1.06251.0538… 1.02641.02280.00360.99643B 1.00201.01051.02641.03100.0046 1.06252A 0.0014 1.06111.0530… 1.02861.02410.0045 1.00162B 1.008 1.020 1.03001.03590.0059 1.06253A 0.0000 1.06251.0544… 1.03001.02660.0034 1.00303B 1.00801.01621.03001.03440.0044 1.06252A 0.0012 1.06131.0548… 1.03811.03410.0040 1.01872B 1.024 1.032 1.03931.04450.0052 1.06253A 0.0000 1.06251.0560… 1.03931.03630.0030 1.01993B 1.02401.03011.03931.04320.0039 1.06251A 0.0022 1.12281.0982… 1.03001.0191 1.01090.95271B 0.9700.998 1.03221.04630.0141 1.12502A 0.0022 1.12281.10641.09821.03001.02280.00720.95272B 0.9700.998 1.03221.04160.0094 1.12503A 0.0000 1.12501.1086… 1.03221.02680.00540.95493B 0.97000.98751.03221.03930.0071 1.12502A 0.0021 1.12291.10791.10041.04171.03480.00690.97412B 0.990 1.015 1.04381.05280.0080 1.12503A 0.0000 1.12501.1100… 1.04381.03860.00520.97623B 0.99001.00471.04381.05050.0067 1.12501A 0.0018 1.12321.1060… 1.06911.06010.0090 1.02401B 1.035 1.053 1.07091.08260.0117 1.12502A 0.0018 1.12321.1118… 1.06911.06310.0060 1.02402B 1.035 1.053 1.07091.07870.0078 1.12503A 0.0000 1.12501.1136… 1.07091.06640.0045 1.02583B 1.03501.04481.07091.07680.0059 1.12502A 0.0015 1.12351.1141… 1.08291.07790.0050 1.04902B 1.057 1.071 1.08441.09090.0065 1.12503A 0.0000 1.12501.1156… 1.08441.08070.00370.05053B 1.05701.06581.08441.08930.0049 1.12502A 0.0014 1.12361.1149… 1.08751.08280.0047 1.05752B 1.065 1.078 1.08891.09510.0062 1.12503A 0.0000 1.12501.1163… 1.08891.08530.0036 1.05893B 1.06501.07301.08891.09350.0046 1.12502A 0.0014 1.12361.1155… 1.09111.08660.0045 1.06412B 1.071 1.082 1.09251.09840.0059 1.12503A 0.0000 1.12501.1169… 1.09251.08910.0034 1.06553B 1.07101.07871.09251.09690.0044 1.12502A 0.0012 1.12381.1173… 1.10061.09660.0040 1.08122B 1.086 1.095 1.10181.10700.0052 1.12503A 0.0000 1.12501.1185… 1.10181.09880.0030 1.08243B 1.08601.09261.10181.10570.0039 1.12502A 0.0021 1.18541.1704… 1.10421.09720.0070 1.03662B 1.052 1.077 1.10631.11540.0091 1.18753A 0.0000 1.18751.1725… 1.10631.10110.0052 1.03873B 1.05201.06721.10631.11310.0068 1.18752A 0.0017 1.18581.1744… 1.13171.12590.0058 1.08662B 1.097 1.115 1.13341.14090.0075 1.18753A 0.0000 1.18751.1761… 1.13341.12910.00431.08833B1.09701.10731.13341.13900.0056 1.18751-1/8-28/1.125-28UN 1-3/16-8/1.1875-8UN 1-3/16-12/1.1875-12UN1-1/8-16/1.125-16UN 1-1/8-18/1.125-18UNEF 1-1/8-20/1.125-20UN 1-1/8-7/1.125-7UNC 1-1/8-8/1.125-8UN 1-1/8-12/1.125-12UNF 1-1/16-18/1.0625-18UNEF 1-1/16-20/1.0625-20UN 1-1/16-28/1.0625-28UN 1-1/16-12/1.0625-12UN 1-1/16-16/1.0625-16UN最大最小最小1最大最小公差范圍最小最大最小最大公差范圍允許偏差倒等級角最小等級2A 0.0015 1.18601.1766… 1.14541.14030.0051 1.11152B 1.120 1.134 1.14691.15350.0066 1.18753A 0.0000 1.18751.1781… 1.14691.14310.0038 1.11303B 1.12001.12831.14691.15190.0050 1.18752A 0.0015 1.18601.1773… 1.14991.14500.0049 1.11992B 1.127 1.140 1.15141.15770.0063 1.18753A 0.0000 1.18751.1788… 1.15141.14780.0036 1.12143B 1.12701.13551.15141.15610.0047 1.18752A 0.0014 1.18611.1780… 1.15361.14890.0047 1.12662B 1.133 1.145 1.15501.16110.0061 1.18753A 0.0000 1.18751.1794… 1.15501.15150.0035 1.12803B 1.13301.14121.15501.15950.0045 1.18752A 0.0012 1.18631.1798… 1.16311.15900.0041 1.14372B 1.149 1.157 1.16431.16960.0053 1.18753A 0.0000 1.18751.1810… 1.16431.16120.0031 1.14493B 1.14901.15511.16431.16830.0040 1.18751A 0.0022 1.24781.2232… 1.15501.14390.0111 1.07771B 1.095 1.123 1.15721.17160.0144 1.25002A 0.0022 1.24781.23141.22321.15501.14760.0074 1.07772B 1.095 1.123 1.15721.16680.0096 1.25003A 0.0000 1.25001.2336… 1.15721.15170.0055 1.07993B 1.09501.11251.15721.16440.0072 1.25002A 0.0021 1.24791.23291.22541.16671.15970.0070 1.09912B 1.115 1.140 1.16881.17800.0092 1.25003A 0.0000 1.25001.2350… 1.16881.16350.0053 1.10123B 1.11501.12971.16881.17570.0069 1.25001A 0.0018 1.24821.2310… 1.19411.18490.0092 1.14901B 1.160 1.178 1.19591.20790.0120 1.25002A 0.0018 1.24821.2368… 1.19411.18790.0062 1.14902B 1.160 1.178 1.19591.20390.0080 1.25003A 0.0000 1.25001.2386… 1.19591.19130.0046 1.15083B 1.16001.16981.19591.20190.0060 1.25002A 0.0015 1.24851.2391… 1.20791.20280.0051 1.17402B 1.182 1.196 1.20941.21600.0066 1.25003A 0.0000 1.25001.2406… 1.20941.20560.0038 1.17553B 1.18201.19081.20941.21440.0050 1.25002A 0.0015 1.24851.2398… 1.21241.20750.0049 1.18242B 1.190 1.203 1.21391.22020.0063 1.25003A 0.0000 1.25001.2413… 1.21391.21030.0036 1.18393B 1.19001.19801.21391.21860.0047 1.25002A 0.0014 1.24861.2405… 1.21611.21140.0047 1.18912B 1.196 1.207 1.21751.22360.0061 1.25003A 0.0000 1.25001.2419… 1.21751.21400.0035 1.19053B 1.19601.20371.21751.22200.0045 1.25002A 0.0012 1.24881.2423… 1.22561.22150.0041 1.20622B 1.211 1.220 1.22681.23210.0053 1.25003A 0.0000 1.25001.2435… 1.22681.22370.0031 1.20743B 1.21101.21761.22681.23080.0040 1.25002A 0.0021 1.31041.2954… 1.22921.22210.0071 1.16162B 1.177 1.202 1.23131.24050.0092 1.31253A 0.0000 1.31251.2975… 1.23131.22600.0053 1.16373B 1.17701.19221.23131.23820.0069 1.31252A 0.0017 1.31081.2994… 1.25671.25090.0058 1.21162B 1.222 1.240 1.25841.26590.0075 1.31253A 0.0000 1.31251.3011… 1.25841.25410.0043 1.21333B 1.22201.23231.25841.26400.0056 1.31252A 0.0015 1.31101.3016… 1.27041.26530.0051 1.23652B 1.245 1.259 1.27191.27850.0066 1.31253A 0.0000 1.31251.3031… 1.27191.26810.00381.23803B1.24501.25331.27191.27690.0050 1.31251-1/4-20/1.250-20UN 1-1/4-28/1.250-28UN 1-5/16-16/1.3125-16UN1-5/16-8/1.3125-8UN 1-5/16-12/1.3125-12UN 1-1/4-12/1.250-12UNF 1-1/4-16/1.250-16UN 1-1/4-18/1.250-18UNEF 1-3/16-28/1.1875-28UN 1-1/4-7/1.250-7UNC 1-1/4-8/1.250-8UN 1-3/16-16/1.1875-16UN1-3/16-18/1.1875-18UNEF 1-3/16-20/1.1875-20UN最大最小最小1最大最小公差范圍最小最大最小最大公差范圍允許偏差倒等級角最小等級2A 0.0015 1.31101.3023… 1.27491.27000.0049 1.24492B 1.252 1.265 1.27641.28270.0063 1.31253A 0.0000 1.31251.3038… 1.27641.27280.0036 1.24643B 1.25201.26051.27641.28110.0047 1.31252A 0.0014 1.31111.3030… 1.27861.27390.0047 1.25162B 1.258 1.270 1.28001.28610.0061 1.31253A 0.0000 1.31251.3044… 1.28001.27650.0035 1.25303B 1.25801.26621.28001.28450.0045 1.31252A 0.0012 1.31131.3048… 1.28811.28400.0041 1.26872B 1.274 1.282 1.28931.29460.0053 1.31253A 0.0000 1.31251.3060… 1.28931.28620.0031 1.26993B 1.27401.28011.28931.29330.0040 1.31251A 0.0024 1.37261.3453… 1.26431.25230.0120 1.17421B 1.195 1.225 1.26671.28220.0155 1.37502A 0.0024 1.37261.35441.34531.26431.25630.0080 1.17422B 1.195 1.225 1.26671.27710.0104 1.37503A 0.0000 1.37501.3568… 1.26671.26070.0060 1.17663B 1.19501.21461.26671.27450.0078 1.37502A 0.0022 1.37281.35781.35031.29161.28440.0072 1.22402B 1.240 1.265 1.29381.30310.0093 1.37503A 0.0000 1.37501.3600… 1.29381.28840.0054 1.22623B 1.24001.25471.29381.30080.0070 1.37501A 0.0019 1.37311.3559… 1.31901.30960.0094 1.27391B 1.285 1.303 1.32091.33320.0123 1.37502A 0.0019 1.37311.3617… 1.31901.31270.0063 1.27392B 1.285 1.303 1.32091.32910.0082 1.37503A 0.0000 1.37501.3636… 1.32091.31620.0047 1.27583B 1.28501.29481.32091.32700.0061 1.37502A 0.0015 1.37351.3641… 1.33291.32780.0051 1.29902B 1.307 1.321 1.33441.34100.0066 1.37503A 0.0000 1.37501.3656… 1.33441.33060.0038 1.30053B 1.30701.31581.33441.33940.0050 1.37502A 0.0015 1.37351.3648… 1.33741.33250.0049 1.30742B 1.315 1.328 1.33891.34520.0063 1.37503A 0.0000 1.37501.3663… 1.33891.33530.0036 1.30893B 1.31501.32301.33891.34360.0047 1.37502A 0.0014 1.37361.3655… 1.34111.33640.0047 1.31412B 1.321 1.332 1.34251.34860.0061 1.37503A 0.0000 1.37501.3669… 1.34251.33900.0035 1.31553B 1.32101.32871.34251.34700.0045 1.37502A 0.0012 1.37381.3673… 1.35061.34650.0041 1.33122B 1.336 1.345 1.35181.35710.0053 1.37503A 0.0000 1.37501.3685… 1.35181.34870.0031 1.33243B 1.33601.34261.35181.35580.0040 1.37502A 0.0024 1.43511.4169… 1.32681.31880.0080 1.23672B 1.257 1.288 1.32921.33960.0104 1.43753A 0.0000 1.43751.4193… 1.32921.32320.0060 1.23913B 1.25701.27711.32921.33700.0078 1.43752A 0.0022 1.43531.4203… 1.35411.34690.0072 1.28652B 1.302 1.327 1.35631.36570.0094 1.43753A 0.0000 1.43751.4225… 1.35631.35090.0054 1.28873B 1.30201.31721.35631.36340.0071 1.43752A 0.0018 1.43571.4243… 1.38161.37570.0059 1.33652B 1.347 1.365 1.38341.39100.0076 1.43753A 0.0000 1.43751.4261… 1.38341.37900.0044 1.33833B 1.34701.35731.38341.38910.0057 1.43752A 0.0016 1.43591.4265… 1.39531.39010.0052 1.36142B 1.370 1.384 1.39691.40370.0068 1.43753A 0.0000 1.43751.4281… 1.39691.39300.00391.36303B1.37001.37831.39691.40200.0051 1.43751-7/16-12/1.4375-12UN 1-7/16-16/1.4375-16UN1-7/16-8/1.4375-8UN 1-3/8-18/1.375-18UNEF 1-3/8-20/1.375-20UN 1-7/16-6/1.4375-6UN 1-3/8-28/1.375-28UN 1-3/8-12/1.375-12UNF 1-3/8-16/1.375-16UN 1-3/8-6/1.375-6UNC 1-3/8-8/1.375-8UN 1-5/16-28/1.3125-28UN 1-5/16-18/1.3125-18UNEF 1-5/16-20/1.3125-20UN。

公制螺纹/英制螺纹规格一览表发布时间：10-06-21 来源：点击量：5424 字段选择：大中小2009-10-9外螺纹大径（单位mm）－－－－－－－－－－－－－－－－-内螺纹小径（单位mm）－－－－－－－－－－－－－－－－-序号规格型号最大最小公差最大最小公差1M10*19.9749.7940.1809.1578.9170.240 2M12*1.511.96811.7320.23610.67610.3760.300 3M14*1.513.96813.7320.23612.67612.3760.300 4M16*1.515.96815.7320.23614.67614.3760.300 5M18*1.517.96817.7320.23616.67616.3760.300 6M20*1.519.96819.7320.23618.67618.3760.300 7M22*1.521.96821.7320.23620.67620.3760.300 8M24*1.523.96823.7320.23622.67622.3760.300 9M26*1.525.96825.7320.23624.67624.3760.300 10M27*1.526.96826.7320.23625.67625.3760.300 11M30*1.529.96829.7320.23628.67628.3760.300 12M27*226.96226.6820.28025.21024.8350.375 13M30*229.96229.6820.28028.21027.8350.375 14M33*232.96232.6820.28031.21030.8350.375 15M36*235.96235.6820.28034.21033.8350.375 16M42*241.96241.6820.28040.21039.8350.375英制螺纹规格一览表外螺纹大径（单位mm）内螺纹小径（单位mm）序号规格型号最大最小公差最大最小公差1G1/8-289.7289.5140.2148.8488.5660.282 2G1/4-1913.15712.9070.25011.89011.4450.445 3G3/8-1916.66216.4120.25015.39514.9500.445 4G1/2-1420.95520.6710.28419.17218.6310.541 5G3/4-1426.44126.1570.28424.65824.1170.541 6G1-1133.24932.8890.36030.93130.2910.640 7G11/4-1141.91041.5500.36039.59238.9520.640 8G11/2-1147.80347.4430.36045.48544.8450.640类别标准名称标准号普通螺纹普通螺纹基本牙型GB/T192 —1981普通螺纹直径与螺距系列GB/T193 —1981普通螺纹基本尺寸GB/T196 —1981普通螺纹公差与配合GB/T197 —1981普通螺纹偏差表GB/T2516 —1981商品紧固件的普通螺纹选用系列JB/T7912 —1999商品紧固件的中等精度普通螺纹极限尺寸GB/T9145 —1988光学螺纹光学仪器特种细牙螺纹ZBN30006—1988光学仪器用目镜螺纹JB/T8204—1995光学仪器用短牙螺纹JB/T5450-1991紧配合螺纹过渡配合螺纹GB/T1167—1996过盈配合螺纹GB/T1181—1998小螺纹小螺纹牙型GB/T1505 4.1—1994 小螺纹直径与螺距系列GB/T1505 4.2—1994小螺纹基本尺寸GB/T1505 4.3—1994小螺纹公差GB/T15054.4-1994小螺纹极限尺寸GB/T15054.5-1994MJ螺纹MJ螺纹基本牙型GJB/T3.1 —1982 MJ螺纹螺栓与螺母螺纹的尺寸与公差GJB/T3.2 —1982MJ螺纹管路件螺纹的尺寸与公差GJB/T3.3 —1985MJ螺纹结构件的尺寸与公差GJB/T3.4 —1985MJ螺纹计算公式GJB/T3.5 —1985MJ螺纹首尾GJB52-1985梯形螺纹梯形螺纹牙型GB/T5796 .1—1986 梯形螺纹直径与螺距系列GB/T5796 .2—1986梯形螺纹基本尺寸GB/T5796 .3—1986梯形螺纹公差GB/T5796 .4—1986梯形螺纹极限尺寸GB/T12359—1990机床梯形螺纹丝杠、螺母技术条件JB/T2886—1992锻钢阀门用短牙梯形螺纹JB/TQ374—1985锯齿形螺纹锯齿形(3 °、30°)螺纹牙型GB/T13576.1—1992锯齿形(3 °、30°)螺纹直径与螺距系列GB/T13576.2—1992锯齿形(3 °、30°)螺纹基本尺寸GB/T13576.3—1992锯齿形(3 °、30°)螺纹公差GB/T13576.4—1992水压机45 °锯齿形螺纹牙型与基本尺寸JB2076—1984管螺纹用螺纹密封的管螺纹GB/T7306 —1987 非螺纹密封的管螺纹GB/T7307 —198760°圆锥管螺纹GB/T12716—1991米制锥螺纹GB/T1415—1992管路旋入端用普通螺纹尺寸系列GB/T1414—1978气瓶专用螺纹GB/T8335-1998通用基准螺纹术语GB/T1479 1—1993公制粗螺纹标准公制细螺纹标准规格标准径最大最小规格标准径最大最小规格标准径最大最小M1.0*0.25 0.75 0.785 0.729 M1.0*0.2 0.8 0.821 0.783 M15*1.0 14 14.353 13.917 M1.1*0.25 0.85 0.885 0.829 M1.1*0.2 0.9 0.921 0.883 M16*1.5 14.5 14.676 14.376 M1.2*0.25 0.95 0.985 0.929 M1.2*0.2 1 1.021 0.983 M16*1.0 15 15.153 14.917 M1.4*0.3 1.1 1.142 1.075 M1.4*0.2 1.2 1.221 1.183 M17*1.5 15.5 15.676 15.376 M1.6*0.35 1.25 1.321 1.221 M1.6*0.2 1.4 1.421 1.383 M17*1.0 16 16.153 15.917 M1.7*0.35 1.35 1.421 1.321 M1.7*0.2 1.45 1.5 1.46 M18*2.0 16 16.21 15.835 M1.8*0.35 1.45 1.521 1.421 M1.8*0.2 1.6 1.621 1.583 M18*1.5 16.5 16.676 16.376 M2.0*0.4 1.6 1.679 1.567 M2.0*0.25 1.75 1.785 1.729 M18*1.0 17 17.153 16.917 M2.2*0.45 1.75 1.888 1.713 M2.2*0.25 1.95 1.985 1.929 M20*2.0 18 18.21 17.835 M2.3*0.4 1.9 1.979 1.867 M2.3*0.25 2.05 2.061 2.001 M20*1.5 18.5 18.676 18.376 M2.5*0.45 2.1 2.138 2.013 M2.5*0.35 2.2 2.221 2.121 M20*1.0 19 19.153 18.917 M2.6*0.45 2.2 2.238 2.113 M2.5*0.35 2.2 2.246 2.186 M22*2.0 20 20.21 19.835 M3.0*0.5 2.5 2.599 2.459 M3.0*0.35 2.7 2.721 2.621 M22*1.5 20.5 20.676 20.376 M3.0*0.6 2.4 2.44 2.28 M3.5*0.35 3.2 3.221 3.121 22*1.0 21 21.153 20.917 M3.5*0.6 2.9 3.01 2.85 M4.0*0.5 3.5 3.599 3.459 M24*2.0 22 22.21 21.835 M4.0*0.7 3.8 3.422 3.242 M4.5*0.5 4 4.099 3.959 M24*1.5 22.5 22.676 22.376M4.0*0.75 3.25 3.326 3.106 M5.0*0.5 4.5 4.599 4.459 M24*1.0 23 23.153 22.917 M4.5*0.7 3.8 3.878 3.688 M5.5*0.5 5 5.099 4.959 M25*2.0 23 23.21 22.835 M5*0.8 4.2 4.334 4.134 M6.0*0.75 5.3 5.378 5.188 M25*1.5 23.5 23.676 23.376 M5*0.9 4.1 4.17 3.98 M6.0*0.5 5.5 5.55 5.4 M25*1.0 24 24.153 23.917 M6*1.0 5 5.153 4.917 M7.0*0.75 6.3 6.378 6.188 M26*1.5 24.5 24.676 24.876 M7*1.0 6 6.153 5.917 M7.0*0.5 6.5 6.55 6.4 M27*2.0 25 25.21 24.735 M8*1.25 6.8 6.912 6.647 M8.0*1 7 7.153 6.917 M27*1.5 25.5 25.676 25.376 M9*1.25 7.8 7.912 7.647 M8.0*0.75 7.3 7.378 7.188 M27*1.0 26 26.153 25.735 M10*1.5 8.5 8.676 8.376 M8.0*0.5 7.5 7.52 7.4 M28*2.0 26 26.21 25.835 M11*1.5 9.5 9.676 9.376 M9.0*1 8 8.153 7.917 M28*1.5 26 26.676 26.376 M12*1.75 10.3 10.24 10.11 M9.0*0.75 8.3 8.378 8.188 M28*1.0 27 27.153 26.917 M14*2.0 12 12.21 11.84 M10*1.25 8.8 8.912 8.647 M30*3.0 27 27.252 26.752 M16*2.0 14 14.21 13.84 M10*1.0 9 9.153 8.917 M30*2.0 28 28.21 27.835 M18*2.5 15.5 15.744 15.29 M10*0.75 9.3 9.378 9.188 M30*1.0 28 28.676 28.376 M20*2.5 17.5 17.744 17.29 M10*0.5 9.5 9.52 9.4 M32*2.0 30 29.153 28.917 M22*2.5 19.5 19.744 19.29 M11*1.0 10 10.15 9.917 M32*1.5 30 30.21 29.835 M24*3.0 21 21.252 20.75 M11*0.75 10.3 10.38 10.19 M33*3.0 30 30.676 30.376 M27*3.0 24 24.252 23.75 M12*1.5 10.5 10.68 10.38 M33*2.0 31 30.252 29.752 M30*3.5 26.5 26.771 26.21 M12*1.25 10.8 10.91 10.65 M33*1.5 31.5 31.21 30.835M12*1 11 11.15 10.92 M35*1.5 33.5 33.676 31.376M12*0.5 11.5 11.52 11.4 M36*3.0 33 33.252 32.752M14*0.5 12.5 12.68 12.38 M36*2.0 34 34.21 33.835M14*1.0 13 13.15 12.92 M36*1.5 34 34.676 34.376M15*1.50 13.5 13.68 13.38美制细螺纹标准公制迫牙丝攻钻孔径规格(丝牙外径）标准径最大最小规格精度等级7－G8 1.25 1.305 1.182 G4－G6 G7－G8 G9 NO.1-72(1.854) 1.55 1.612 1.474 M1.0*0.25 0.86 0.88 NO.2-64(2.134) 1.85 1.912 1.756 M1.1*0.25 0.96 0.98 NO.3-56(2.515) 2.1 2.197 2.025 M1.2*0.25 1.06 1.08 NO.4-48(2.345) 2.4 2.456 2.271 M1.4*0.3 1.24 1.25 NO.5-44(3.175) 2.7 2.74 2.551 M1.6*0.35 1.41 1.43 NO.6-40(3.505) 2.9 3.022 2.82 M1.7*0.35 1.51 1.53 NO.8-36(4.166) 3.5 3.606 3.404 M1.8*0.35 1.61 1.63NO.10-32(4.326) 4.1 4.165 3.963 M2.0*0.4 1.78 1.8NO.12-28(5.846) 4.6 4.724 4.496 M2.2*0.45 1.95 1.981\4-28 5.5 5.588 5.36 M2.3*0.4 2.08 2.15\16-24 6.9 7.035 6.782 M2.5*0.45 2.25 2.283\8-24 8.5 8.636 8.382 M2.6*0.45 2.35 2.387\16-20 9.9 10.033 9.729 M3.0*0.5 2.73 2.751\2-20 11.5 11.607 11.329 M3.5*0.6 3.17 3.29\16-18 12.9 13.081 12.751 M4.0*0.7 3.62 3.65 3.69 5\8-18 14.5 14.681 14.351 M5.0*0.8 4.56 4.6 4.64 3\4-16 17.5 17.678 17.323 M6.0*1.0 5.45 5.5 5.55 7\8-14 20.5 20.675 20.27 M7.0*1.0 6.45 6.5 6.55 1\8-12 23.2 23.571 23.114 M8.0*1.25 7.31 7.38 7.44 1-1\8-12 26.5 26.746 26.289 M10*1.5 9.18 9.25 9.32 1-1\4-12 29.5 29.921 29.464 M10*1.25 9.31 9.38 9.44 1-3\8-12 32 33.096 32.639 M12*1.75 11.04 11.12 11.21 1-1\2-12 36 36.271 35.814 M12*1.25 11.31 11.38 11.44英美联合螺纹标准英美联细螺纹标准规格钻头径2B螺纹径规格钻头径下孔径上限下限上限下限NO.1-64UNC 1.55 1.582 1.425 no.0-80unf 1.25 1.305 1.182 NO.2-56UNC 1.8 1.871 1.695 no.1-72unf 1.55 1.612 1.474 NO.3-48UNC 2.1 2.146 1.941 no.2-64-unf 1.85 1.912 1.756 NO.4-40UNC 2.3 2.385 2.157 no.3-565unf 2.1 2.197 2.025 NO.5-40UNC 2.6 2.679 2.487 no.4-48unf 2.4 2.458 2.271 NO.6-32UNC 2.8 2.895 2.642 no.5-44unf 2.7 2.74 2.551 NO.832UNC 3.4 3.53 3.302 no.6-40unf 2.9 3.022 2.82 NO.10-24UNC 3.9 3.926 3.683 no.8-36unf 3.5 3.606 3.404 NO.12-24UNC 4.5 4.597 4.344 no.10-32unf 4.1 4.165 3.963 1\4-20UNC 5.1 5.257 4..979 no.12-28unf 4.6 4.724 4.496 5\16-18unc 6.6 6.731 6.401 1\4-28unf 5.5 5.588 5.363\8-16UNC 8 8.153 7.798 5\16-24unf 6.9 7.035 6.782 7\16-14UNC 9.4 9.55 9.144 3\8-24unf 8.5 8.636 8.382 1\2-13UNC 10.8 11.023 10.599 7\16-20unf 9.9 10.033 9.729 9\16-12UNC 12.2 12.446 11.989 1\2-unf 11.5 11.607 11.3295\8-11UNC 13.6 13.868 13.386 9\16-unf 12.9 13.081 12.75 3\4-10UNC 16.5 16.84 16.307 5\8-18unf 14.5 14.681 14.35 7\8-9UNC 19.5 19.761 19.177 3\4-16unf 17.5 17.678 17.32 1--8UNC 22.2 22.606 21.971 7\8-14unf 20.5 20.675 20.27 11\8-7UNC 25 25.349 24.813 1--12unf 23.2 23.571 23.11 11\4-7UNC 28.2 28.524 27.813 11\8-12unf 26.5 26.746 26.28 13\8-6UNC 30.8 31.115 30.353 11\4-12unf 29.5 29.921 29.46 11\2-6UNC 34 34.29 33.528 13\8-12unf 32.8 33.096 32.63 13\4-5UNC 39.5 39.827 38.964 11\2-12unf 36 36.271 35.81 2-41\2UNC 45.2 45.593 44.679惠式螺纹标准（旧英制牙）山数节距换算表规格钻头径A例B例山数(25.4) 节数*W1\8-40 2.65 2.6 100 0.254*W5\32-32 3.25 3.2 880 0.317 5*w3\16-24 3..75 3.7 772 0.351 8W1\4-20 5.1 5 64 0.396 9W5\16-18 6.6 5 60 0.423 3W3\8-16 8 6.5 56 0.453 6W7\16-14 9.4 7.9 48 0.529 2W1\2-12 10.7 9.310.5 44 0.577 3W9\16-12 12.3 12 40 0.635W5\8-11 13.7 13.5 36 0.705 6W3\4-10 16.7 16.5 32 0.793 8W7\8-9 19.5 19.3 28 0.907 1W1-8 22.4 22 24 1.058 3W1\8-7 25 24.8 20 1.27W11\4 28.3 28 18 1.411 1W13\8-6 30.5 30.3 16 1.587 5W11\2-6 33.8 33.5 14 1.814 3W15\8-5 36 35.7 13 1.953 8W13\4-5 39.2 39 12 2.116 7W11\8-5 41.8 41.5 11 2.309 1W2-41\2 45 44.7 10 2.54牙套螺纹攻用标准9 2.8222规格钻头径下孔径8 3.175上限下限7 3.6286M3*0.5 3.1 3.2 3.12 6 4.2333M4*0.7 4.2 4.3 4.17 5 5.08M5*0.8 5.2 5.33 5.16 41\2 5.6444M6*1 6.3 6.42 6.25 4 6.35M8*1.25 8.4 8.52 8.31 31\2 7.2571M10*1.5 10.5 10.62 10.37 31\2 7.8154M10*1.25 10.4 10.52 10.31 3 8.4667M10*1 10.3 10.42 10.25 27\8 8.8348M12*1.75 12.5 12.73 12.43 23\4 9.2364M12*1.5 12.5 12.62 12.37 25\8 9.6762M12*1.25 12.5 12.52 12.31 21\2 10.16M14*2 14.5 14.83 14349M14*1.5 14.5 14.62 14.37M16*2 16.5 16.83 16.49M16*1.5 16.5 16.62 16.37M18*2.5 19 19.04 18.58M18*1.5 18.5 18.62 18.37M20*2.5 21 21.04 20.58M20*1.5 20.5 20.62 20.37公制、美制和英制螺纹标准NPT，PT，G 都是管螺纹．NPT 是National (American) Pipe Thread 的缩写，属於美国标准的60 度锥管螺纹，用於北美地区．国家标准可查阅GB/T12716-1991 PT 是Pipe Thread 的缩写，是5 5 度密封圆锥管螺纹，属惠氏螺纹家族，多用於欧洲及英联邦国家．常用於水及煤气管行业，锥度规定为1:16．国家标准可查阅GB/T7306-2000 G 是55 度非螺纹密封管螺纹，属惠氏螺纹家族．标记为G 代表圆柱螺纹．国家标准可查阅GB/T7307-2001 另外螺纹中的1/4、1/2、1/8 标记是指螺纹尺寸的直径，单位是英吋．行内人通常用分来称呼螺纹尺寸，一吋等於8分，1/4 吋就是2分，如此类推．G 好像就是管螺纹的统称(Guan)，55，60度的划分属于功能性的，俗称管圆。

英制管螺纹内径外径对照表尺寸代号每寸牙数大径中径小径建议底孔基准距离牙数1/8 27 10.242 9.489 8.736 φ8.6 4.102 4.361/4 18 13.616 12.487 11.358 φ11.1 5.786 4.103/8 18 17.055 15.926 14.797 φ14.5 6.096 4.321/2 14 21.223 19.772 18.321 φ17.9 8.128 4.483/4 14 26.568 25.117 23.666 φ23.28.611 4.751 11.5 33.228 31.461 29.694 φ29.2 10.160 4.601-1/4 11.5 41.985 40.218 38.451 φ37.9 10.668 4.831-1/2 11.5 48.054 46.287 44.520 φ43.9 10.668 4.83常用螺纹规范对照表符号螺纹种类规范牙型角M 公制粗牙 ISO 261 60°S 细小螺丝 ISO R1501 60°UNC 统一牙粗牙 ISO 263 60° UNF 统一牙细牙 ISO 263 60° UNEF 统一牙特细牙 ISO 263 60° UN 统一牙固定牙 ISO 263 60° UNS 统一牙特殊牙 ----- 60°NC 美制牙粗牙 ANSI B1.1 60° NF 美制牙细牙 ANSI B1.1 60° NEF 美制牙特细牙 ANSI B1.1 60° N 美制牙固定牙 ANSI B1.1 60° NS 美制牙特殊牙 ANSI B1.1 60°BSW 英制牙粗牙 BS 84 55°BSF 英制牙细牙 BS 84 55°BC 自行车牙 JIS B0225 60°SM 针车用 JIS B0226 60°CTV 自行行车用风嘴 JIS D9422 60°TV 汽车用风嘴 JID D4207 60°BSC 英制自行车 BS 811 60°BA 英制小螺丝 BS 93 30°47°Tr 公制爱克母牙 ISO 2902 30°TW 爱克姆牙 JIS B0222 29°ACME 爱克姆牙 ANSI B1.5 29°STUB-ACME 浅牙爱克姆 ANSI B1.8 29° C 平行管用螺纹 ISO 228/1 55°BSPF 英制平行管螺纹 BS 2779 55°PF 英制平行管螺纹 IS B0202 55°R 管用推拔管用 ISO 7/1 55°1/16Rc 管用推拔内螺纹 ISO 7/1 55°1/16Rp 管用平行内螺纹 ISO 7/1 55°PT 推拔管用 JIS B0203 55°1/16PS 平行内螺纹 JIS B0203 55°BSP 英制管牙 BS 21.2779 55°NPT 美制一般推拔管用 ANSI B2.1 60°1/16 NPTR 美制栏杆接头用 ANSI B2.1 60°1/16 NPS 美制一般平行管用 ANSI B2.1 60° NPSM 美制平行管用装配器用 ANSI B2.1 60° NPSL 美制锁紧螺帽用 ANSI B2.1 60°NPSH 美制水管用 ANSI B2.1 60°NPSC 美制管接头用 ANSI B2.1 60°NH 美制消防水管用 ANSI B2.1 60°NPSF 美制干封管用平行内螺纹 ANSI B2.1 60°NPTI 美制干封管用平行 ANSI B2.1 60° NPTF 美制干封管用推拔 ANSI B2.1 60°1/16 NGT 美制瓦斯用推拔 ANSI B57.1 60°1/16 NGS 美制瓦斯用平行 ANSI B57.1 60°NGO 美制瓦斯用出口 ANSI B57.1 60°SGT 美制瓦斯用特殊 ANSI B57.1 60°1/8E 电灯泡用 JIS C7709 圆V 瓦斯桶凡而用 JIS B8245/6 55°3/26C 薄铜电线管用 JIS B0204 80°常用规格（公制）M1.2*0.25 M2.5*0.45 M6*0.75 M10*0.75 M1.4*0.3 M2.6*0.45 M6*1 M10*1M1.6*0.35 M3*0.5 M7*0.75 M10*1.25M1.7*0.25 M3*0.6 M7*1 M10*1.5M1.7*0.35 M3.5*0.6 M8*0.75 M11*1M1.8*0.35 M4*0.5 M8*1 M11*1.5M2*0.4 M4*0.7 M8*1.25 12*1M2.2*0.45 M5*0.5 M9*1 M12*1.25M2.3*0.45 M5*0.8 M9*1.25 M12*1.5常用规格（美制）0-80UNF 5-40UNC 10-32UNF 5/16〃-32UNEF1-64UNC 5-44UNV 12-24UNC 3/8〃-16UNC1-72UNF 6-32UNC 12-28UNF 3/8〃-24UNF2-56UNC 6-40UNF 12-32UNEF 3/8〃-32UNEF2-64UNF 5/32〃-32UNC 1/4〃-20UNC 7/16〃-14UNC 3-48UNC 8-32UNC 1/4〃-28UNF 7/16〃-20UNF3-56UNF 8-36UNF 1/4〃-32UNEF 7/16〃-28UNEF4-40UNC 3/16〃-24UNC 5/16〃-18UNC 1/2〃-13UNC 4-48UNF 10-24UNC 5/16〃-24UNF 1/2〃-20UNF 常用规格（英制）1/8〃-40 1/2〃-12 1〃-8 2〃-4.55/32〃-32 9/16〃-12 1-1/8〃-7 2-1/8〃-43/16〃-24 5/8〃-11 1-1/4〃-7 2-1/4〃-47/32〃-24 11/16〃-11 1-3/8〃-6 2-1/2〃-41/4〃-20 3/4〃-16 1-1/2〃-6 2-3/4〃-45/16〃-18 13/16〃-10 1-5/8〃-5 3-1/4〃-43/8〃-16 7/8〃-9 1-1/4〃-5 3-1/2〃-47/16〃-14 15/16〃-9 1-7/8〃-4.5 3-3/4〃-44〃-4。