公制螺纹和美制标准对照表

TAPS & DIES & CENTER DRILLS螺丝攻,切牙丝板与中心钻咀株式会社本社 1 04 东京都中央区京桥3-13-10TEL: (03)561-2711 FAX: (03) 564-6838螺丝攻牙钻孔径和滚造径对照表 本表所推选之钻头孔径,是针对攻牙加工时,能够很容易的了解钻孔直径；而依据市售之标准钻头所选定的.在使用钻头的情况下,由于钻头的形状及尺寸、精度、被钻孔之材质等,对于所钻孔的尺寸、精度有很大的影响,所以使用本表之钻孔径,若有不当之处,应视实际状况适当的变更钻头直径.本表是依据2级牙制订.Homepage: E-mail :enquire@ISO 9001 国际规格J QA-1318 品质保证2级牙孔径 精 度 等 级规 格标准径最大 最小 规 格G4-G6 G7-G8 G9M1.0×0.25 0.750.785 0.729M1.0×0.250.860.88 -- M1.1×0.25 0.850.885 0.829M1.1×0.250.960.98 -- M1.2×0.25 0.950.985 0.929M1.2×0.25 1.06 1.08 -- M1.4×0.3 1.10 1.142 1.075M1.4×0.3 1.24 1.25 -- M1.6×0.35 1.25 1.321 1.221M1.6×0.35 1.41 1.43 -- M1.7×0.35 1.35 1.421 1.321M1.7×0.35 1.51 1.53 -- M1.8×0.35 1.45 1.521 1.421M1.8×0.35 1.61 1.63 -- M2.0×0.4 1.60 1.679 1.567M2.0×0.4 1.78 1.80 -- M2.2×0.45 1.75 1.838 1.713M2.2×0.45 1.95 1.98 -- M2.3×0.4 1.90 1.979 1.867M2.3×0.4 2.08 2.10 -- M2.5×0.45 2.10 2.138 2.013M2.5×0.45 2.25 2.28 -- M2.6×0.45 2.20 2.238 2.113M2.6×0.45 2.35 2.38 -- M3.0×0.5 2.50 2.599 2.459M3.0×0.5 2.73 2.75 -- M3.0×0.6 2.40 2.440 2.280M3.5×0.6 3.17 3.20 -- M3.5×0.6 2.90 3.010 2.850M4.0×0.7 3.62 3.65 3.69M4.0×0.7 3.30 3.422 3.242M5.0×0.8 4.56 4.60 4.64M4.0×0.75 3.25 3.326 3.106M6.0×1.0 5.45 5.50 5.55M4.5×0.75 3.80 3.878 3.688M7.0×1.0 6.45 6.50 6.55M5.0×0.8 4.20 4.334 4.134M8.0×1.257.317.38 7.44M5.0×0.9 4.10 4.170 3.930M10×1.59.189.25 9.32M6.0×1. 0 5.00 5.153 4.917M10×1.259.319.38 9.44M7.0×1.0 6.00 6.153 5.917M12×1.7511.0411.12 11.21M8.0×1.25 6.80 6.912 6.647M12×1.2511.3111.38 11.44M9.0×1.25 7.807.912 7.647M10×1.5 8.508.676 8.376M11×1.5 9.509.676 9.376M12×1.75 10.3010.441 10.106M14×2.0 12.0012.210 11.835M16×2.0 14.0014.210 13.835注: 迫牙丝攻之钻孔径,在上表所列之数值,由于被加工材料之材质、硬度、形状、尺寸等之影响,多少会有所变动,因此于参考上表之同时,亦请增减若干.M18×2.5 15.5015.744 15.294M20×2.5 17.5017.744 17.294M22×2.5 19.5019.744 19.294规 格滚造径 M24×3.0 21.0021.252 20.752M3×0.5 2.63-2.60 M 27×3.0 24.0024.252 23.752M3.0×0.6 2.56-2.53 M30×3.5 26.5026.771 26.211M3.5×0.6 3.06-3.03 M4.0×0.7 3.49-3.45 M4.0×0.75 3.45-3.41 M4.5×0.75 3.96-3.92 M5.0×0.8 4.43-4.38 M5.0×0.9 4.36-4.31 M6.0×1.0 5.30-5.25 M7.0×1.0 6.30-6.25 M8.0×1.07.28-7.23M8.0×1.257.12-7.072级牙钻孔径2级牙钻孔径规 格标准径 最大 最小规 格 标准径最大 最小M1.0×0.2 0.80 0.821 0.783 M17×1.5 15.50 15.676 15.376M1.1×0.2 0.90 0.921 0.883 M17×1.0 16.00 16.153 15.917M1.2×0.2 1.00 1.021 0.983 M18×2.0 16.00 16.210 15.835M1.4×0.2 1.20 1.221 1.183 M18×1.5 16.50 16.676 16.376M1.6×0.2 1.40 1.421 1.383 M18×1.0 17.00 17.153 16.917M1.7×0.2 1.45 1.500 1.460 M20×2.0 18.00 18.210 17.835M1.8×0.2 1.60 1.621 1.583 M20×1.5 18.50 18.676 18.376M2.0×0.25 1.75 1.785 1.729 M20×1.0 19.00 19.153 18.917M2.2×0.25 1.95 1.985 1.929 M22×2.0 20.00 20.210 19.835M2.3×0.25 2.05 2.061 2.001 M22×1.5 20.50 20.676 20.376M2.5×0.35 2.20 2.221 2.121 M22×1.0 21.00 21.153 20.917M2.6×0.35 2.20 2.246 2.186 M24×2.0 22.00 22.210 21.835M3.0×0.35 2.70 2.721 2.621 M24×1.5 22.50 22.676 22.376M3.5×0.35 3.20 3.221 3.121 M24×1.0 23.00 23.153 22.917M4.0×0.5 3.50 3.599 3.459 M25×2.0 23.00 23.210 22.835M4.5×0.5 4.00 4.099 3.959 M25×1.5 23.50 23.676 23.376M5.0×0.5 4.50 4.599 4.459 M25×1.0 24.00 24.153 23.917M5.5×0.5 5.00 5.099 4.959 M26×1.5 24.50 24.676 24.376M6.0×0.75 5.30 5.378 5.188 M27×2.0 25.00 25.210 24.835M6.0×0.5 5.50 5.550 5.400 M27×1.5 25.50 25.676 25.376M7.0×0.75 6.30 6.378 6.188 M27×1.0 26.00 26.153 25.917M7.0×0.5 6.50 6.550 6.400 M28×2.0 26.00 26.210 25.835M8.0×1.0 7.00 7.153 6.917 M28×1.5 26.50 26.676 26.376M8.0×0.75 7.30 7.378 7.188 M28×1.0 27.00 27.153 26.917M8.0×0.5 7.50 7.520 7.400 M30×3.0 27.00 27.252 26.752M9.0×1.0 8.00 8.153 7.917 M30×2.0 28.00 28.210 27.835M9.0×0.75 8.30 8.378 8.188 M30×1.5 28.50 28.676 28.376M10×1.25 8.80 8.912 8.647 M30×1.0 29.00 29.153 28.917M10×1.0 9.00 9.153 8.917 M32×2.0 30.00 30.210 29.835M10×0.75 9.30 9.378 9.188 M32×1.5 30.50 30.676 30.376M10×0.5 9.50 9.520 9.400 M33×3.0 30.00 30.252 29.752M11×1.0 10.00 10.153 9.917 M33×2.031.00 31.210 30.835M11×0.75 10.30 10.378 10.188M33×1.5 31.50 31.676 31.376M12×1.5 10.50 10.676 10.376M36×3.0 33.00 33.252 32.752M12×1.0 11.00 11.153 10.917M36×2.0 34.00 34.210 33.835M12×0.5 11.50 11.520 11.400M36×1.5 34.50 34.676 34.376M14×1.5 12.50 12.676 12.376M35×1.5 33.50 33.676 33.376M14×1.0 13.00 13.153 12.917M15×1.5 13.50 13.676 13.376M15×1.0 14.00 14.153 13.917M16×1.5 14.50 14.676 14.376M16×1.015.00 15.153 14.9172级牙钻孔径 2级牙钻孔径 规格 (UNC)标准径 最大 最小规格 (UNF)标准径最大 最小(螺丝牙外径)(螺丝牙外径) No.1-64(1.854) 1.55 1.582 1.425 No.0-80(1.524) 1.25 1.305 1.182 No.2-56(2.184) 1.80 1.871 1.695 No.1-72(1.854) 1.55 1.612 1.474 No.3-48(2.515) 2.10 2.146 1.941 No.2-64(2.184) 1.85 1.912 1.756 No.4-40(2.845) 2.30 2.385 2.157 No.3-56(2.515) 2.10 2.197 2.025 No.5-40(3.175) 2.60 2.697 2.487 No.4-48(2.845) 2.40 2.458 2.271 No.6-32(3.505) 2.80 2.895 2.642 No.5-44(3.175) 2.70 2.740 2.551 No.8-32(4.166) 3.40 3.530 3.302 No.6-40(3.505) 2.90 3.022 2.820 No.10-24(4.826) 3.90 3.962 3.683 No.8-36(4.166) 3.50 3.606 3.404 No.12-24(5.486) 4.50 4.597 4.344 No.10-32(4.826) 4.10 4.165 3.963 1/4 - 20 5.10 5.257 4.979 No.12-28(5.846) 4.60 4.724 4.496 5/16 - 18 6.60 6.731 6.401 1/4 -28 5.50 5.588 5.360 3/8 - 16 8.00 8.153 7.798 5/16 -24 6.90 7.035 6.782 7/16 - 14 9.40 9.550 9.144 3/8 -24 8.50 8.636 8.382 1/2 - 13 10.80 11.023 10.5927/16 -20 9.90 10.033 9.729 9/16 - 12 12.20 12.446 11.9891/2 -20 11.50 11.607 11.329 5/8 - 11 13.60 12.868 13.3869/16 -18 12.90 13.081 12.7513/4 - 10 16.50 18.840 16.3075/8 -18 14.50 14.681 14.3517/8 - 9 19.50 19.761 19.1773/4 -16 17.50 17.678 17.3231 - 8 22.20 22.606 21.9717/8 -14 20.50 20.675 20.2701-1/8 - 7 25.00 25.349 24.638 1 -12 23.20 23.571 23.114 1-1/4 - 7 28.20 28.524 27.8131-1/8 -12 26.50 26.746 26.2891-3/8 - 6 30.80 31.115 30.3531-1/4 -12 29.50 29.921 29.4641-1/2 - 6 34.00 34.290 33.5281-3/8 -12 32.80 33.096 32.6391-3/4 - 5 39.50 39.827 38.9642 - 4-1/2 45.20 45.593 44.679美制特细螺纹2级牙钻孔径规格(UNEF)标准径最大最小No.12 - 32 4.70 4.826 4.623 1/4 - 32 5.60 5.690 5.486 5/16 -32 7.10 7.264 7.087 3/8 - 32 8.70 8.865 8.661 7/16 - 28 10.20 10.338 10.1351/2 - 28 11.80 11.938 11.7099/16 - 24 13.20 13.386 13.1325/8 -24 14.80 14.986 14.7323/4 -20 17.80 17.958 17.6787/8 -20 21.00 21.133 20.853精度等级钻孔径 规 格 G4-G6 G7-G8 G9 规 格标准径最大 最小 No.2-56UNC 1.94 -- -- PS 1/16 - 28 6.50 6.632 6.490 No.3 -48 2.23 -- -- PS 1/8 -288.50 8.637 8.495 No.4 -40 2.50 -- -- PS 1/4 -1911.40 11.549 11.341 No.5 -40 2.83 -- -- PS 3/8 -1915.00 15.054 14.846No.6 -32 3.07 -- -- PS 1/2 -1418.50 18.773 18.489No.8 -32 3.73 3.77 -- PS 3/4 -1424.00 24.259 23.975No.10 -24 4.24 4.30 -- PS 1 -1130.20 30.471 30.111 No.12 -24 4.90 4.96 -- PS 1-1/4 -1138.80 39.132 38.7721/4 -20 -- 5.72 -- PS 1-1/12 -1144.80 45.025 44.6655/16 -18 -- 7.24 -- PS 2 -1156.5056.836 56.4763/8 -16 -- 8.74 8.81 7/16 -14 -- 10.20 10.301/2 -13 -- 11.27 11.82No.2-64UNF 1.97 -- --No.3 -56 2.27 -- -- No.4 -48 2.56 -- --No.5 -44 2.86 -- -- 钻 孔 径 No.6 -40 3.16 -- -- N P TNo.8 -36 3.78 -- -- 规 格使用绞刀时不用绞刀时 NPSNo.10 -32 4.39 4.43 -- 1/16 -27 6.10 6.25 6.35 No.12 -28 4.99 5.04 -- 1/8 -27 8.33 8.43 8.74 1/4 -28 5.85 5.90 -- 1/4 -18 10.72 11.13 11.13 5/16 -24 7.36 7.41 -- 3/8 -18 14.27 14.27 14.68 3/8 -24 -- 9.00 -- 1/2 -14 17.48 17.86 18.26 7/16 -20 -- 10.48 10.543/4 -14 22.63 23.01 23.42 1/2 -20 -- 12.07 12.13 1 -11-1/2 28.58 28.98 29.36 1 -1/4 - 11-1/237.31 37.69 38.10 1 -1/2 - 11-1/243.66 44.04 44.45规 格 钻孔径2BA 4.0-4.2 3BA4BA 3.0-3.2 5BA 2.7-2.8 6BA 2.4-2.5标准径规格使用绞刀时不用绞刀时有效牙部之长度(最小)中之毋螺牙内径标准长度(最小)中之毋螺牙内径PT 1/16 - 28 6.10 6.20 6.244 6.384 规格滚造径PT 1/8 - 28 8.10 8.20 8.249 8.388 SM 1/8 -40 2.735 -2.688 PT 1/4 - 19 10.70 11.00 10.962 11.174 SM 1/8 -44 2.769 -2.722 PT 3/8 - 19 14.20 14.50 14.448 14.658 SM 9/64 -40 3.128 -3.083 PT 1/2 - 14 17.60 18.00 17.979 18.263 SM 11/64 -40 3.855 -3.805 PT 3/4 - 14 23.00 23.50 23.378 23.663 SM 3/16 -32 4.205 -4.155 PT 1 - 11 29.00 29.50 29.459 29.822 SM 3/16 -28 4.143 -4.093 PT 1-1/4 - 11 37.50 38.00 37.976 38.339 SM 7/32 -32 5.003 -4.955 PT 1-1/2 - 11 43.40 44.00 43.869 44.232 SM 15/64 -28 5.325 -5.570 PT 2 -11 54.90 55.50 55.412 55.844 SM 1/4 - 40 5.890 -5.735SM 1/4 -28 5.721 -5.366SM 9/32 -28 6.508 -6.648SM 11/32 -28 8.092 -8.432SM 3/8 -28 8.880 -8.015钻孔径SM 7/16 -28 10.466-10.401 规格硬材软材SM 7/16 -16 10.037-9.967 W 1/8 - 40 2.65 2.60 SM 1/2 -20 11.819-11.749W 5/32 - 32 3.25 3.20 SM 9/16 -20 13.400-13.425W 3/16 -24 3.75 3.70W 1/4 -20 5.10 5.00W 5/16 -18 6.60 6.50W 3/8 -16 8.00 7.90W 7/16 -14 9.40 9.30W 1/2 -12 10.70 10.50W 9/16 -12 12.30 12.00W 5/8 -11 13.70 13.50W 3/4 -10 16.70 16.50W 7/8 -9 19.50 19.30W 1 - 8 22.40 22.00W 1-1/8 - 7 25.00 24.80W 1-1/4 - 7 28.30 28.00。

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。

公制/美制/英制螺纹对照表A型美制螺纹（UNF）常用规格外螺纹螺纹-4 9/16"-19牙 14.28 13.08 -6 11/16''-16 17.46 16.1-8 13/16''-16 20.64 19.28-10 1''-14 25.40 23.57-12 1(3/16)''-12 30.00 28.32 -16 1(7/16)''-12 36.51 34.67 -20 1(11/16)''-12 42.86 41.02C型JIC37度美制UNF螺纹常用规格-4 7/16”-20 11.11 10.03-5 1/2”-20 12.70 11.32-6 9/16”-18 14.28 13.08-8 3/4”-16 19.00 17.68-10 7/8”-14 22.22 20.68-12 1(1/16)"-12 26.98 25.15 -16 1(5/16)"-12 33.33 31.5 -20 1(5/8)"-12 41.28 39.44 -24 1(7/8)"-12 47.62 45.8-32 2(1/2)"-12 63.5 61.67英制圆柱管螺纹（BSPP）常用规格-4 1/4”-19 13.157 11.55-6 3/8”-19 16.662 14.95-8 1/2”-14 20.955 18.63-12 3/4”-14 26.441 24.11-16 1”-11 33.249 30.29-20 1(1/4)''-11 41.91 38.95英制圆锥管螺纹（BSPT）常用规格基面大径基准距离1/4”-19 13.157 63/8”-19 16.662 6.41/2”-14 20.955 8.23/4”-14 26.441 9.51”-11 33.249 10.41(1/4)''-11 41.91 12.7美制圆锥管螺纹（NPT）1/8”-27 10.24 41/4”-18 13.60 43/8”-18 17.04 4.321/2”-14 21.22 4.483/4”-14 26.57 4.751”-11(1/2)” 33.22 4.61(1/4)”-11.5 41.96 4.832007-4-20 16:33评论(7)3/8-16 0.3643 0.3737 0.3287 0.3331 0.2970 8.40 8.44(0.375-16) 9.2532 9.4920 8.3490 8.4607 7.54387/16-14 0.4258 0.4361 0.3850 0.3897 0.3485 9.83 9.87(0.4375-14) 10.8153 11.0769 9.7790 9.8984 8.85191/2-13 0.4876 0.4985 0.4435 0.4485 0.4041 11.34 11.38(0.50-13) 12.3850 12.6619 11.2649 11.3919 10.26419/16-12 0.5495 0.5609 0.5016 0.5068 0.4587 12.80 12.84(0.5625-12) 13.9573 14.2469 12.7406 12.8727 11.65105/8-11 0.6113 0.6234 0.5589 0.5644 0.5119 14.27 14.32 (0.625-11) 15.5270 15.8344 14.1961 14.3358 13.00233/4-10 0.7353 0.7482 0.6773 0.6832 0.6255 17.28 17.33 (0.750-10) 18.6766 19.0043 17.2034 17.3533 15.88777/8-9 0.8592 0.8731 0.7946 0.8009 0.7368 20.27 20.32(0.875-9) 21.8237 22.1767 20.1828 20.3429 18.71471"-8 0.9830 0.9980 0.9100 0.9168 0.8446 23.22 23.27(1.000-8) 24.9682 25.3492 23.1140 23.2867 21.45281.螺胚直径指滚丝前的尺寸，数值为依经验公式计算而得，在实践中需验证。

公制标准牙公制幼牙尺寸牙距(MM)底孔直径(MM)尺寸牙距(MM)底孔直径(MM)尺寸牙距(MM)底孔直径(MM)M10.250.7(0.75)M1.10.250.8(0.85)M1.20.250.9(0.95)M1.40.31.1M1.60.351.2(1.25)M1.80.351.4(1.45)M20.41.6M2.20.451.7(1.75)M2.50.452.0(2.05)M30.52.5M3.50.62.9M40.73.3M4.50.753.7M50.84.2M615M716M81.256.8M91.257.8M101.58.5M111.59.5M121.7510.2M14212M16214M182.515.5M202.517.5M222.519.5M24321M27324M303.526.5M333.529.5M36432M39435M424.537.5M454.540.5M48543M52547M565.550.5M2.50.352.1(2.15)M30.352.6(2.65)M3.50.353.1(3.15)M40.53.5M4.50.54M50.54.5M5.50.55M60.755.2M70.756.2M80.757.217M90.758.218M100.759.2191.258.8M110.7510.2110M121111.2510.81.510.5M141131.2512.81.512.5M151141.513.5M161151.514.5M171161.515.5M181171.516.5216M201191.518.5218M22121M241231.522.5222124M251.523.5223126M271.525.5225127M281.526.5226129M301.528.5228327M321.530.52301.531.5M33231330M351.533.51.534.5M36234333M381.536.5M39 1.537.5237336M401.538.5238337M421.540.52403394381.543.51/16601.153/32481.81/8402.65/32323.13/16243.67/32244.41/4205.19/32205.81.520.5220M45243342441尺寸英制标准牙BSW英制幼牙BSF 美制标准牙UNC 美制幼牙UNF 美制幼牙UNEF英制喉牙G,BSP英制锥喉牙Rc,BSPT 美制喉牙NPS 美制锥喉牙NPT英制(tach)牙距(per inch)底孔直径(MM)牙距(per inch)底孔直径(MM)牙距(per inch)底孔直径(MM)牙距(per inch)底孔直径(MM)牙距(per inch)底孔直径(MM)牙距(per inch)底孔直径(MM)牙距(per inch)底孔直径(MM)牙距(per inch)底孔直径(MM)牙距(per inch)底孔直径(MM)5/16186.53/8167.97/16149.31/21210.59/1612121113.511/1611153/4106.513/1610187/8919.25920.751"8221.1/8724.751.1/4727.751.3/8630.51.1/2633.51.5/8535.51.3/45391.7/84.541.55/82"4.544.52.1/44502.1/2456.52.3/43.5623"3.568.5324284.7265.4266.2226.8208.3189.81611.21612.714141415.7512171218.511201121.751023926929832835837.5740743746.5652658.5664.5569.75205.1186.6168149.41310.81212.21113.51016.5919.5822.25725728630.75634539.54.5454.551.5457.25463.5470285.5246.9248.5209.92011.51812.91814.51617.51420.41223.251226.51229.51232.751236325.5327.1328.62810.12811.724132414.752017.52019.252020.752022.252023.751826.751830183318362416.25288.8288.6278.51911.81911.518111915.2519151814.514191418.5141814211424.5142414231428.251130.751130.2511.5291818141411.511.51518.52430278.91135.51139.5113911.53811.53911421145114511.54411.5451149.611571156.511.55611.5571163.31179.111511172.81171.48678681185.5883884美制小牙孔标准牙(NC)美制小牙孔幼牙(NC)牙距(per inch)编号底孔直径(MM)底孔深度(MM)螺纹深度(MM)牙距(per inch)编号底孔直径(MM)底孔深度(MM)螺纹深度(MM)64#1-641.5(1.55)5456#2-561.8(1.85)6448#3-482.175402.3(2.35)8640#5-402.6(2.65)9632#6-322.8(2.85)10732#8-323.511824#10-243.9131024#12-244.51511#4-4080#0-801.2(1.25)4372#1-721.5(1.55)5464#2-641.964562.1(2.15)7548#4-482.48644#5-442.79640#6-402.9(2.95)10736#8-363.511832#10-324.11310#3-5628#12-284.71511制订:审核:日期:公制,英制,美制螺纹标准谢敬锋。

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）序号规格型号最大最小公差最小最大公差1 7/16"-20 11.079 10.874 0.206 9.728 10.033 0.3052 1/2"-20 12.667 12.461 0.206 11.328 11.608 0.2793 9/16"-18 14.252 14.031 0.221 12.751 13.081 0.3304 3/4"-16 19.012 18.773 0.239 17.323 17.678 0.3565 7/8"-14 22.184 21.923 0.262 20.269 20.676 0.406-12 26.944 26.655 0.290 24.689 25.146 0.457 6 11/16-12 33.294 33.005 0.290 31.039 31.496 0.457 7 15/168 15/-12 41.229 40.940 0.290 38.989 39.446 0.4578-12 47.579 47.290 0.290 45.339 45.796 0.457 9 17/8-12 63.452 63.162 0.290 61.214 61.671 0.457 10 21/2公制细牙6g外螺纹大径6H内螺纹小径1 M10*1 9.974 9.794 0.180 8.917 9.157 0.2402 M12*1.5 11.968 11.732 0.236 10.376 10.676 0.3003 M14*1.5 13.968 13.732 0.236 12.376 12.676 0.3004 M16*1.5 15.968 15.732 0.236 14.376 14.676 0.3005 M18*1.5 17.968 17.732 0.236 16.376 16.676 0.3006 M20*1.5 19.968 19.732 0.236 18.376 18.676 0.3007 M22*1.5 21.968 21.732 0.236 20.376 20.676 0.3008 M24*1.5 23.968 23.732 0.236 22.376 22.676 0.3009 M26*1.5 25.968 25.732 0.236 24.376 24.676 0.30010 M27*1.5 26.968 26.732 0.236 25.376 25.676 0.30011 M30*1.5 29.968 29.732 0.236 28.376 28.676 0.3000.375 12 M27*2 26.962 26.682 0.280 24.83525.21013 M30*2 29.962 29.682 0.280 27.835 28.210 0.37514 M33*2 32.962 32.682 0.280 30.835 31.210 0.37515 M36*2 35.962 35.682 0.280 33.835 34.210 0.37516 M42*2 41.962 41.682 0.280 39.835 40.210 0.375英制管螺纹1 G1/8-28 9.728 9.514 0.214 8.566 8.848 0.2822 G1/4-19 13.157 12.907 0.250 11.445 11.890 0.4453 G3/8-19 16.662 16.412 0.250 14.950 15.395 0.4454 G1/2-14 20.955 20.671 0.284 18.631 19.172 0.5415 G3/4-14 26.441 26.157 0.284 24.117 24.658 0.5416 G1-11 33.249 32.889 0.360 30.291 30.931 0.640-11 41.910 41.550 0.360 38.952 39.592 0.6407 G11/4-11 47.803 47.443 0.360 44.845 45.485 0.6408 G11/2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）常用规格牙型角60外螺纹内螺纹 -4 9/16"-19牙 14.28 13.08 -6 11/16''-16 17.46 16.1 -8 13/16''-16 20.64 19.28 -10 1''-14 2 5.40 23.57 -12 1(3/16)''-12 30.00 28.32 -16 1(7/16)''-12 36.51 34.67 -20 1(11/16)' '-12 42.86 41.02 C型JIC37度美制UNF螺纹常用规格牙型角60-4 7/16”-20 11.11 10.03 -5 1/2”-20 12.70 11.32-6 9/16”-18 14.28 13.08 -83/4”-16 19.00 17.68 -10 7/8”-14 22.22 20.68 -12 1(1/16)"-12 26.98 25.15 -16 1 (5/16)"-12 33.33 31.5 -20 1(5/8)"-12 41.28 39.44 -24 1(7/8)"-12 47.62 45.8 -32 2(1/2)"-12 63.5 61.67 英制圆柱管螺纹（BSPP）常用规格牙型角55-4 1/4”-19 13.157 11.55 -6 3/8”-19 16.662 14.95 -8 1/2”-14 20.955 18.63 -12 3/4”-14 26.441 24.11 -16 1”-11 33.249 30.29 -20 1(1/4)''-11 41.91 38.95 英制圆锥管螺纹（BSPT）常用规格牙型角55基面大径基准距离1/4”-19 13.157 6 3/8”-19 16.662 6.4 1/2”-14 20.955 8.2 3/4”-14 26.441 9.5 1”-11 33.249 10.4 1(1/4)''-11 41.91 12.7 美制圆锥管螺纹（NPT）牙型角601/8”-27 10.24 4 1/4”-18 13.60 4 3/8”-18 17.04 4.32 1/2”-14 21.22 4.48 3/4”-14 26.57 4.75 1”-11(1/2)” 33.22 4.6 1(1/4)”-11.5 41.96 4.83螺纹的一般知识第一章国标螺纹的一般知识一. 螺纹的分类1. 螺纹分内螺纹和外螺纹两种；2. 按牙形分可分为：1）三角形螺纹2）梯形螺纹3）矩形螺纹4）锯齿形螺纹；3. 按线数分单头螺纹和多头螺纹；4. 按旋入方向分左旋螺纹和右旋螺纹两种, 右旋不标注，左旋加LH，如M24×1.5LH；5. 按用途不同分有：米制普通螺纹、用螺纹密封的管螺纹、非螺纹密封的管螺纹、60°圆锥管螺纹、米制锥螺纹等二. 米制普通螺纹1. 米制普通螺纹用大写M表示，牙型角2α=60°（α表示牙型半角）；2. 米制普通螺纹按螺距分粗牙普通螺纹和细牙普通螺纹两种；2.1. 粗牙普通螺纹标记一般不标明螺距，如M20表示粗牙螺纹；细牙螺纹标记必须标明螺距，如M30×1.5表示细牙螺纹、其中螺距为1.5。

TAPS & DIES & CENTER DRILLS螺丝攻,切牙丝板与中心钻咀株式会社本社 1 04 东京都中央区京桥3-13-10TEL: (03)561-2711 FAX: (03) 564-6838螺丝攻牙钻孔径和滚造径对照表 本表所推选之钻头孔径,是针对攻牙加工时,能够很容易的了解钻孔直径；而依据市售之标准钻头所选定的.在使用钻头的情况下,由于钻头的形状及尺寸、精度、被钻孔之材质等,对于所钻孔的尺寸、精度有很大的影响,所以使用本表之钻孔径,若有不当之处,应视实际状况适当的变更钻头直径.本表是依据2级牙制订.Homepage: E-mail :enquire@ISO 9001 国际规格J QA-1318 品质保证2级牙孔径 精 度 等 级规 格标准径最大 最小 规 格G4-G6 G7-G8 G9M1.0×0.25 0.750.785 0.729M1.0×0.250.860.88 -- M1.1×0.25 0.850.885 0.829M1.1×0.250.960.98 -- M1.2×0.25 0.950.985 0.929M1.2×0.25 1.06 1.08 -- M1.4×0.3 1.10 1.142 1.075M1.4×0.3 1.24 1.25 -- M1.6×0.35 1.25 1.321 1.221M1.6×0.35 1.41 1.43 -- M1.7×0.35 1.35 1.421 1.321M1.7×0.35 1.51 1.53 -- M1.8×0.35 1.45 1.521 1.421M1.8×0.35 1.61 1.63 -- M2.0×0.4 1.60 1.679 1.567M2.0×0.4 1.78 1.80 -- M2.2×0.45 1.75 1.838 1.713M2.2×0.45 1.95 1.98 -- M2.3×0.4 1.90 1.979 1.867M2.3×0.4 2.08 2.10 -- M2.5×0.45 2.10 2.138 2.013M2.5×0.45 2.25 2.28 -- M2.6×0.45 2.20 2.238 2.113M2.6×0.45 2.35 2.38 -- M3.0×0.5 2.50 2.599 2.459M3.0×0.5 2.73 2.75 -- M3.0×0.6 2.40 2.440 2.280M3.5×0.6 3.17 3.20 -- M3.5×0.6 2.90 3.010 2.850M4.0×0.7 3.62 3.65 3.69M4.0×0.7 3.30 3.422 3.242M5.0×0.8 4.56 4.60 4.64M4.0×0.75 3.25 3.326 3.106M6.0×1.0 5.45 5.50 5.55M4.5×0.75 3.80 3.878 3.688M7.0×1.0 6.45 6.50 6.55M5.0×0.8 4.20 4.334 4.134M8.0×1.257.317.38 7.44M5.0×0.9 4.10 4.170 3.930M10×1.59.189.25 9.32M6.0×1. 0 5.00 5.153 4.917M10×1.259.319.38 9.44M7.0×1.0 6.00 6.153 5.917M12×1.7511.0411.12 11.21M8.0×1.25 6.80 6.912 6.647M12×1.2511.3111.38 11.44M9.0×1.25 7.807.912 7.647M10×1.5 8.508.676 8.376M11×1.5 9.509.676 9.376M12×1.75 10.3010.441 10.106M14×2.0 12.0012.210 11.835M16×2.0 14.0014.210 13.835注: 迫牙丝攻之钻孔径,在上表所列之数值,由于被加工材料之材质、硬度、形状、尺寸等之影响,多少会有所变动,因此于参考上表之同时,亦请增减若干.M18×2.5 15.5015.744 15.294M20×2.5 17.5017.744 17.294M22×2.5 19.5019.744 19.294规 格滚造径 M24×3.0 21.0021.252 20.752M3×0.5 2.63-2.60 M 27×3.0 24.0024.252 23.752M3.0×0.6 2.56-2.53 M30×3.5 26.5026.771 26.211M3.5×0.6 3.06-3.03 M4.0×0.7 3.49-3.45 M4.0×0.75 3.45-3.41 M4.5×0.75 3.96-3.92 M5.0×0.8 4.43-4.38 M5.0×0.9 4.36-4.31 M6.0×1.0 5.30-5.25 M7.0×1.0 6.30-6.25 M8.0×1.07.28-7.23M8.0×1.257.12-7.072级牙钻孔径2级牙钻孔径规 格标准径 最大 最小规 格 标准径最大 最小M1.0×0.2 0.80 0.821 0.783 M17×1.5 15.50 15.676 15.376M1.1×0.2 0.90 0.921 0.883 M17×1.0 16.00 16.153 15.917M1.2×0.2 1.00 1.021 0.983 M18×2.0 16.00 16.210 15.835M1.4×0.2 1.20 1.221 1.183 M18×1.5 16.50 16.676 16.376M1.6×0.2 1.40 1.421 1.383 M18×1.0 17.00 17.153 16.917M1.7×0.2 1.45 1.500 1.460 M20×2.0 18.00 18.210 17.835M1.8×0.2 1.60 1.621 1.583 M20×1.5 18.50 18.676 18.376M2.0×0.25 1.75 1.785 1.729 M20×1.0 19.00 19.153 18.917M2.2×0.25 1.95 1.985 1.929 M22×2.0 20.00 20.210 19.835M2.3×0.25 2.05 2.061 2.001 M22×1.5 20.50 20.676 20.376M2.5×0.35 2.20 2.221 2.121 M22×1.0 21.00 21.153 20.917M2.6×0.35 2.20 2.246 2.186 M24×2.0 22.00 22.210 21.835M3.0×0.35 2.70 2.721 2.621 M24×1.5 22.50 22.676 22.376M3.5×0.35 3.20 3.221 3.121 M24×1.0 23.00 23.153 22.917M4.0×0.5 3.50 3.599 3.459 M25×2.0 23.00 23.210 22.835M4.5×0.5 4.00 4.099 3.959 M25×1.5 23.50 23.676 23.376M5.0×0.5 4.50 4.599 4.459 M25×1.0 24.00 24.153 23.917M5.5×0.5 5.00 5.099 4.959 M26×1.5 24.50 24.676 24.376M6.0×0.75 5.30 5.378 5.188 M27×2.0 25.00 25.210 24.835M6.0×0.5 5.50 5.550 5.400 M27×1.5 25.50 25.676 25.376M7.0×0.75 6.30 6.378 6.188 M27×1.0 26.00 26.153 25.917M7.0×0.5 6.50 6.550 6.400 M28×2.0 26.00 26.210 25.835M8.0×1.0 7.00 7.153 6.917 M28×1.5 26.50 26.676 26.376M8.0×0.75 7.30 7.378 7.188 M28×1.0 27.00 27.153 26.917M8.0×0.5 7.50 7.520 7.400 M30×3.0 27.00 27.252 26.752M9.0×1.0 8.00 8.153 7.917 M30×2.0 28.00 28.210 27.835M9.0×0.75 8.30 8.378 8.188 M30×1.5 28.50 28.676 28.376M10×1.25 8.80 8.912 8.647 M30×1.0 29.00 29.153 28.917M10×1.0 9.00 9.153 8.917 M32×2.0 30.00 30.210 29.835M10×0.75 9.30 9.378 9.188 M32×1.5 30.50 30.676 30.376M10×0.5 9.50 9.520 9.400 M33×3.0 30.00 30.252 29.752M11×1.0 10.00 10.153 9.917 M33×2.031.00 31.210 30.835M11×0.75 10.30 10.378 10.188M33×1.5 31.50 31.676 31.376M12×1.5 10.50 10.676 10.376M36×3.0 33.00 33.252 32.752M12×1.0 11.00 11.153 10.917M36×2.0 34.00 34.210 33.835M12×0.5 11.50 11.520 11.400M36×1.5 34.50 34.676 34.376M14×1.5 12.50 12.676 12.376M35×1.5 33.50 33.676 33.376M14×1.0 13.00 13.153 12.917M15×1.5 13.50 13.676 13.376M15×1.0 14.00 14.153 13.917M16×1.5 14.50 14.676 14.376M16×1.015.00 15.153 14.9172级牙钻孔径 2级牙钻孔径 规格 (UNC)标准径 最大 最小规格 (UNF)标准径最大 最小(螺丝牙外径)(螺丝牙外径) No.1-64(1.854) 1.55 1.582 1.425 No.0-80(1.524) 1.25 1.305 1.182 No.2-56(2.184) 1.80 1.871 1.695 No.1-72(1.854) 1.55 1.612 1.474 No.3-48(2.515) 2.10 2.146 1.941 No.2-64(2.184) 1.85 1.912 1.756 No.4-40(2.845) 2.30 2.385 2.157 No.3-56(2.515) 2.10 2.197 2.025 No.5-40(3.175) 2.60 2.697 2.487 No.4-48(2.845) 2.40 2.458 2.271 No.6-32(3.505) 2.80 2.895 2.642 No.5-44(3.175) 2.70 2.740 2.551 No.8-32(4.166) 3.40 3.530 3.302 No.6-40(3.505) 2.90 3.022 2.820 No.10-24(4.826) 3.90 3.962 3.683 No.8-36(4.166) 3.50 3.606 3.404 No.12-24(5.486) 4.50 4.597 4.344 No.10-32(4.826) 4.10 4.165 3.963 1/4 - 20 5.10 5.257 4.979 No.12-28(5.846) 4.60 4.724 4.496 5/16 - 18 6.60 6.731 6.401 1/4 -28 5.50 5.588 5.360 3/8 - 16 8.00 8.153 7.798 5/16 -24 6.90 7.035 6.782 7/16 - 14 9.40 9.550 9.144 3/8 -24 8.50 8.636 8.382 1/2 - 13 10.80 11.023 10.5927/16 -20 9.90 10.033 9.729 9/16 - 12 12.20 12.446 11.9891/2 -20 11.50 11.607 11.329 5/8 - 11 13.60 12.868 13.3869/16 -18 12.90 13.081 12.7513/4 - 10 16.50 18.840 16.3075/8 -18 14.50 14.681 14.3517/8 - 9 19.50 19.761 19.1773/4 -16 17.50 17.678 17.3231 - 8 22.20 22.606 21.9717/8 -14 20.50 20.675 20.2701-1/8 - 7 25.00 25.349 24.638 1 -12 23.20 23.571 23.114 1-1/4 - 7 28.20 28.524 27.8131-1/8 -12 26.50 26.746 26.2891-3/8 - 6 30.80 31.115 30.3531-1/4 -12 29.50 29.921 29.4641-1/2 - 6 34.00 34.290 33.5281-3/8 -12 32.80 33.096 32.6391-3/4 - 5 39.50 39.827 38.9642 - 4-1/2 45.20 45.593 44.679美制特细螺纹2级牙钻孔径规格(UNEF)标准径最大最小No.12 - 32 4.70 4.826 4.623 1/4 - 32 5.60 5.690 5.486 5/16 -32 7.10 7.264 7.087 3/8 - 32 8.70 8.865 8.661 7/16 - 28 10.20 10.338 10.1351/2 - 28 11.80 11.938 11.7099/16 - 24 13.20 13.386 13.1325/8 -24 14.80 14.986 14.7323/4 -20 17.80 17.958 17.6787/8 -20 21.00 21.133 20.853精度等级钻孔径 规 格 G4-G6 G7-G8 G9 规 格标准径最大 最小 No.2-56UNC 1.94 -- -- PS 1/16 - 28 6.50 6.632 6.490 No.3 -48 2.23 -- -- PS 1/8 -288.50 8.637 8.495 No.4 -40 2.50 -- -- PS 1/4 -1911.40 11.549 11.341 No.5 -40 2.83 -- -- PS 3/8 -1915.00 15.054 14.846No.6 -32 3.07 -- -- PS 1/2 -1418.50 18.773 18.489No.8 -32 3.73 3.77 -- PS 3/4 -1424.00 24.259 23.975No.10 -24 4.24 4.30 -- PS 1 -1130.20 30.471 30.111 No.12 -24 4.90 4.96 -- PS 1-1/4 -1138.80 39.132 38.7721/4 -20 -- 5.72 -- PS 1-1/12 -1144.80 45.025 44.6655/16 -18 -- 7.24 -- PS 2 -1156.5056.836 56.4763/8 -16 -- 8.74 8.81 7/16 -14 -- 10.20 10.301/2 -13 -- 11.27 11.82No.2-64UNF 1.97 -- --No.3 -56 2.27 -- -- No.4 -48 2.56 -- --No.5 -44 2.86 -- -- 钻 孔 径 No.6 -40 3.16 -- -- N P TNo.8 -36 3.78 -- -- 规 格使用绞刀时不用绞刀时 NPSNo.10 -32 4.39 4.43 -- 1/16 -27 6.10 6.25 6.35 No.12 -28 4.99 5.04 -- 1/8 -27 8.33 8.43 8.74 1/4 -28 5.85 5.90 -- 1/4 -18 10.72 11.13 11.13 5/16 -24 7.36 7.41 -- 3/8 -18 14.27 14.27 14.68 3/8 -24 -- 9.00 -- 1/2 -14 17.48 17.86 18.26 7/16 -20 -- 10.48 10.543/4 -14 22.63 23.01 23.42 1/2 -20 -- 12.07 12.13 1 -11-1/2 28.58 28.98 29.36 1 -1/4 - 11-1/237.31 37.69 38.10 1 -1/2 - 11-1/243.66 44.04 44.45规 格 钻孔径2BA 4.0-4.2 3BA4BA 3.0-3.2 5BA 2.7-2.8 6BA 2.4-2.5标准径规格使用绞刀时不用绞刀时有效牙部之长度(最小)中之毋螺牙内径标准长度(最小)中之毋螺牙内径PT 1/16 - 28 6.10 6.20 6.244 6.384 规格滚造径PT 1/8 - 28 8.10 8.20 8.249 8.388 SM 1/8 -40 2.735 -2.688 PT 1/4 - 19 10.70 11.00 10.962 11.174 SM 1/8 -44 2.769 -2.722 PT 3/8 - 19 14.20 14.50 14.448 14.658 SM 9/64 -40 3.128 -3.083 PT 1/2 - 14 17.60 18.00 17.979 18.263 SM 11/64 -40 3.855 -3.805 PT 3/4 - 14 23.00 23.50 23.378 23.663 SM 3/16 -32 4.205 -4.155 PT 1 - 11 29.00 29.50 29.459 29.822 SM 3/16 -28 4.143 -4.093 PT 1-1/4 - 11 37.50 38.00 37.976 38.339 SM 7/32 -32 5.003 -4.955 PT 1-1/2 - 11 43.40 44.00 43.869 44.232 SM 15/64 -28 5.325 -5.570 PT 2 -11 54.90 55.50 55.412 55.844 SM 1/4 - 40 5.890 -5.735SM 1/4 -28 5.721 -5.366SM 9/32 -28 6.508 -6.648SM 11/32 -28 8.092 -8.432SM 3/8 -28 8.880 -8.015钻孔径SM 7/16 -28 10.466-10.401 规格硬材软材SM 7/16 -16 10.037-9.967 W 1/8 - 40 2.65 2.60 SM 1/2 -20 11.819-11.749W 5/32 - 32 3.25 3.20 SM 9/16 -20 13.400-13.425W 3/16 -24 3.75 3.70W 1/4 -20 5.10 5.00W 5/16 -18 6.60 6.50W 3/8 -16 8.00 7.90W 7/16 -14 9.40 9.30W 1/2 -12 10.70 10.50W 9/16 -12 12.30 12.00W 5/8 -11 13.70 13.50W 3/4 -10 16.70 16.50W 7/8 -9 19.50 19.30W 1 - 8 22.40 22.00W 1-1/8 - 7 25.00 24.80W 1-1/4 - 7 28.30 28.00。

各国标准螺纹基本尺寸对照表(总13页)本页仅作为文档封面，使用时可以删除This document is for reference only-rar21year.March英制管螺纹基本尺寸及公差（牙形角55º） BSPP英制锥管螺纹基本尺寸及公差（牙形角55º）BSPT美制管螺纹基本尺寸及公差（牙形角60º） UN(F)公制螺纹基本尺寸及公差(牙形角60º) M55°圆锥管螺纹基本尺寸对照表最新下载-汇兴达55°圆锥管螺纹基本尺寸对照表最新下载-汇兴达55°圆锥管螺纹(BSPT)R 2R2 1/ 221/2"11R33"11R44"11R55"11R66"11聊城市鑫茂祥管业有限公司专业经营钢管规格：5mm*1mm—1020mm*200mm合金钢管、外径22mm-127mm冷轧无缝钢管、外径127mm-600mm，壁厚16mm-100mm，外径精度±%,壁厚精度±5%热轧中厚壁无缝钢管、16Mn外径400—1600mm、壁厚20—60mm的大口径厚壁卷管，可定尺到16米及各种规格的无缝方管、异型无缝钢管等.常备钢管种类有:构造用无缝钢管、流体用无缝钢管、液压无缝钢管、电力用无缝钢管、石油输送用无缝钢管、化肥设备用无缝钢管、煤矿用无缝钢管、不锈钢无缝钢管、化工用无缝钢管、纺织机械用无缝钢管、汽车；水利用无缝钢管，精密无缝钢管、光亮无缝钢管、军工医疗用无缝钢管、管道用无缝钢管、支柱用无缝钢管、合金无缝管、高压无缝管、大口径直缝焊管等。

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管螺纹的基本尺寸表(2010-10-25 15:57:35)转载▼标签：杂谈表（1）螺纹基本尺寸G1/2 、ZG1/2 (单位:mm)锥管螺纹的基本尺寸表（3-28）1/2PT 、1/2NPT 表（2）螺纹基本尺寸 (单位:mm)螺纹标准的一种，按外形分圆柱、圆锥两种；按牙型角分55°、60°两种。

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）序号规格型号最大最小公差最小最大公差1 7/16"-20 11.079 10.874 0.206 9.728 10.033 0.3052 1/2"-20 12.667 12.461 0.206 11.328 11.608 0.2793 9/16"-18 14.252 14.031 0.221 12.751 13.081 0.3304 3/4"-16 19.012 18.773 0.239 17.323 17.678 0.3565 7/8"-14 22.184 21.923 0.262 20.269 20.676 0.406-12 26.944 26.655 0.290 24.689 25.146 0.457 6 11/16-12 33.294 33.005 0.290 31.039 31.496 0.457 7 15/168 15/-12 41.229 40.940 0.290 38.989 39.446 0.4578-12 47.579 47.290 0.290 45.339 45.796 0.457 9 17/8-12 63.452 63.162 0.290 61.214 61.671 0.457 10 21/2公制细牙6g外螺纹大径6H内螺纹小径1 M10*1 9.974 9.794 0.180 8.917 9.157 0.2402 M12*1.5 11.968 11.732 0.236 10.376 10.676 0.3003 M14*1.5 13.968 13.732 0.236 12.376 12.676 0.3004 M16*1.5 15.968 15.732 0.236 14.376 14.676 0.3005 M18*1.5 17.968 17.732 0.236 16.376 16.676 0.3006 M20*1.5 19.968 19.732 0.236 18.376 18.676 0.3007 M22*1.5 21.968 21.732 0.236 20.376 20.676 0.3008 M24*1.5 23.968 23.732 0.236 22.376 22.676 0.3009 M26*1.5 25.968 25.732 0.236 24.376 24.676 0.30010 M27*1.5 26.968 26.732 0.236 25.376 25.676 0.30011 M30*1.5 29.968 29.732 0.236 28.376 28.676 0.3000.375 12 M27*2 26.962 26.682 0.280 24.83525.21013 M30*2 29.962 29.682 0.280 27.835 28.210 0.37514 M33*2 32.962 32.682 0.280 30.835 31.210 0.37515 M36*2 35.962 35.682 0.280 33.835 34.210 0.37516 M42*2 41.962 41.682 0.280 39.835 40.210 0.375英制管螺纹1 G1/8-28 9.728 9.514 0.214 8.566 8.848 0.2822 G1/4-19 13.157 12.907 0.250 11.445 11.890 0.4453 G3/8-19 16.662 16.412 0.250 14.950 15.395 0.4454 G1/2-14 20.955 20.671 0.284 18.631 19.172 0.5415 G3/4-14 26.441 26.157 0.284 24.117 24.658 0.5416 G1-11 33.249 32.889 0.360 30.291 30.931 0.640-11 41.910 41.550 0.360 38.952 39.592 0.6407 G11/4-11 47.803 47.443 0.360 44.845 45.485 0.6408 G11/2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）常用规格牙型角60外螺纹内螺纹 -4 9/16"-19牙 14.28 13.08 -6 11/16''-16 17.46 16.1 -8 13/16''-16 20.64 19.28 -10 1''-14 2 5.40 23.57 -12 1(3/16)''-12 30.00 28.32 -16 1(7/16)''-12 36.51 34.67 -20 1(11/16)' '-12 42.86 41.02 C型JIC37度美制UNF螺纹常用规格牙型角60-4 7/16”-20 11.11 10.03 -5 1/2”-20 12.70 11.32-6 9/16”-18 14.28 13.08 -83/4”-16 19.00 17.68 -10 7/8”-14 22.22 20.68 -12 1(1/16)"-12 26.98 25.15 -16 1 (5/16)"-12 33.33 31.5 -20 1(5/8)"-12 41.28 39.44 -24 1(7/8)"-12 47.62 45.8 -32 2(1/2)"-12 63.5 61.67 英制圆柱管螺纹（BSPP）常用规格牙型角55-4 1/4”-19 13.157 11.55 -6 3/8”-19 16.662 14.95 -8 1/2”-14 20.955 18.63 -12 3/4”-14 26.441 24.11 -16 1”-11 33.249 30.29 -20 1(1/4)''-11 41.91 38.95 英制圆锥管螺纹（BSPT）常用规格牙型角55基面大径基准距离1/4”-19 13.157 6 3/8”-19 16.662 6.4 1/2”-14 20.955 8.2 3/4”-14 26.441 9.5 1”-11 33.249 10.4 1(1/4)''-11 41.91 12.7 美制圆锥管螺纹（NPT）牙型角601/8”-27 10.24 4 1/4”-18 13.60 4 3/8”-18 17.04 4.32 1/2”-14 21.22 4.48 3/4”-14 26.57 4.75 1”-11(1/2)” 33.22 4.6 1(1/4)”-11.5 41.96 4.83螺纹的一般知识第一章国标螺纹的一般知识一. 螺纹的分类1. 螺纹分内螺纹和外螺纹两种；2. 按牙形分可分为：1）三角形螺纹2）梯形螺纹3）矩形螺纹4）锯齿形螺纹；3. 按线数分单头螺纹和多头螺纹；4. 按旋入方向分左旋螺纹和右旋螺纹两种, 右旋不标注，左旋加LH，如M24×1.5LH；5. 按用途不同分有：米制普通螺纹、用螺纹密封的管螺纹、非螺纹密封的管螺纹、60°圆锥管螺纹、米制锥螺纹等二. 米制普通螺纹1. 米制普通螺纹用大写M表示，牙型角2α=60°（α表示牙型半角）；2. 米制普通螺纹按螺距分粗牙普通螺纹和细牙普通螺纹两种；2.1. 粗牙普通螺纹标记一般不标明螺距，如M20表示粗牙螺纹；细牙螺纹标记必须标明螺距，如M30×1.5表示细牙螺纹、其中螺距为1.5。

螺纹规格表_螺纹标准螺纹规格表_螺纹标准-值得收藏更新时间：2018-05-03螺纹规格表_螺纹大全-做机械和气动元件值得收藏做机械的天天打交道，时间一长国内的国外的，公制的英制的，直的锥的，密封的非密封的，内的外的，55度的60度的。

总之常常被搞乱，用一次从头到尾查一次，我这里也算是归纳总结一下，希望有所帮助，我的做法是常用的打印出来放在桌边，用时随时拿来查看，时间长了就自然记住了。

（一）NPT是一般用途的美国标准锥管螺纹，牙型角为60°PT牙为英制锥螺纹，牙型角为55°，密封中最常用。

英制管螺纹是细牙螺纹，因为粗牙螺纹的牙深大，会严重的降低所切螺纹外径管子的强度。

PF牙是管用平行螺纹。

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，G是管螺纹的统称(Guan)，55、60度的划分属于功能性的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是英制螺纹的公称直径，单位是英寸。

（二）1、英寸制统一螺纹在英寸制国家广泛采用，该类螺纹分三个系列：粗牙系列UNC，细牙系列UNF，特细牙系列UNFF，外加一个定螺距系列UN。

标注方法：螺纹直径—每英寸牙数系列代号—精度等级示例：粗牙系列 3/8—16UNC—2A细牙系列 3/8—24UNF—2A特细牙系列 3/8—32UNFF—2A定螺距系列 3/8—20UN—2A第一位数字3/8表示螺纹外径，单位为英寸，转换为米制单位mm要乘以25.4，即3/8×25.4=9.525mm；第二、三位数字16、24、32、20为每英寸牙数(在25.4mm长度上的牙数)；第三位以后的文字代号UNC、UNF、UNFF、UN为系列代号，最后两位2A为精度等级。