公制英制美制粗细螺纹规格大全

英美制特制螺纹对照表(附图)英制美制迫牙丝攻钻孔径对照表图美制螺纹和英制管螺纹对照表英制美制联合螺纹和英美美联细螺纹对照表英制螺纹规格和公制螺纹规格对照表6g 外螺纹大径6H 内螺纹小径序号规格型号最大最小公差最大最小公差1 M10*1 9.974 9.794 0.180 9.157 8.917 0.2402 M12*1.5 11.968 11.732 0.236 10.676 10.376 0.3003 M14*1.5 13.968 13.732 0.236 12.676 12.376 0.3004 M16*1.5 15.968 15.732 0.236 14.676 14.376 0.3005 M18*1.5 17.968 17.732 0.236 16.676 16.376 0.3006 M20*1.5 19.968 19.732 0.236 18.676 18.376 0.3007 M22*1.5 21.968 21.732 0.236 20.676 20.376 0.3008 M24*1.5 23.968 23.732 0.236 22.676 22.376 0.3009 M26*1.5 25.968 25.732 0.236 24.676 24.376 0.30010 M27*1.5 26.968 26.732 0.236 25.676 25.376 0.30011 M30*1.5 29.968 29.732 0.236 28.676 28.376 0.30012 M27*2 26.962 26.682 0.280 25.210 24.835 0.37513 M30*2 29.962 29.682 0.280 28.210 27.835 0.37514 M33*2 32.962 32.682 0.280 31.210 30.835 0.37515 M36*2 35.962 35.682 0.280 34.210 33.835 0.37516 M42*2 41.962 41.682 0.280 40.210 39.835 0.3751 G1/8-28 9.728 9.514 0.214 8.848 8.566 0.2822 G1/4-19 13.157 12.907 0.250 11.890 11.445 0.4453 G3/8-19 16.662 16.412 0.250 15.395 14.950 0.4454 G1/2-14 20.955 20.671 0.284 19.172 18.631 0.5415 G3/4-14 26.441 26.157 0.284 24.658 24.117 0.5416 G1-11 33.249 32.889 0.360 30.931 30.291 0.6407 G11/4-11 41.910 41.550 0.360 39.592 38.952 0.6408 G11/2-11 47.803 47.443 0.360 45.485 44.845 0.640英制螺纹的识别英寸制统一螺纹，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。

规格 NO.2 NO.3 NO.4 NO.5 NO.6 NO.8 NO.10 NO.12 1/4 5/16 3/8 7/16 1/2
规格 1/8 5/32 3/16 1/4 5/16 3/8 7/16 1/2
英制螺纺滚造径(韦氏) 外径 滚造径 牙数 最大 最小 最大 最小 40 3.145 3.030 2.72 2.70 32 3.945 3.795 3.40 3.38 24 4.732 4.592 4.03 4.00 20 6.320 6.165 5.48 5.45 18 7.905 7.737 6.97 6.94 16 9.490 9.312 8.44 8.40 14 11.074 10.883 9.88 9.84 12 12.662 12.456 11.27 11.22
外径 最大 最小
滚造径 最大 最小
1.98 1.89 1.70 1.67 2.58 2.48 2.26 2.23 2.98 2.87 2.63 2.60 3.47 3.36 3.06 3.03 3.98 3.84 3.49 3.45 4.47 4.34 3.96 3.92 4.98 4.83 4.43 4.38 5.97 5.82 5.30 5.25 6.97 6.82 6.30 6.25 7.96 7.79 7.12 7.07 8.96 8.79 8.12 8.07 9.96 9.77 8.97 8.91 11.95 11.76 10.79 10.73
公制细牙滚造前后直径
规格
M4 M4.5 M5 M6 M7 M8 M9 MБайду номын сангаас0 M10 M12
牙数
0.50 0.50 0.50 0.75 0.75 1.00 1.00 1.25 1.00 1.25

5/16 -18 6.50 7.02 6.41
3/8 -16 7.90 8.49 7.81
7/16 -14 9.30 9.93 9.15
1/2 -13 10.80 11.43 10.58
9/16 -12 12.20 12.91 12.00
5/8 -11 13.50 14.38 13.38
3/4 -10 16.50 17.40 16.30
2.96 3.64 4.32 5.00 6.55 8.17 9.75 11.39 12.98 14.59 16.18
3.12 3.82 4.50 5.18 6.72 8.35 9.93 11.59 13.18 14.80 16.39
3/4-16 19.50 19.39 19.61
美制號數牙之外徑換算
規格
NPT NPS 下孔徑 下孔徑
1/16 -27 6.20 6.35
1/8 -27 8.50 8.75
1/4 -18 11.00 11.15
3/8 -18 14.50 14.70
1/2 -14 18.00 18.15
3/4 -14 23.00 23.40
1
-11 1/2 29.00 29.40
1 1/4 -11 1/ 38.00 38.10
6.30 8.30 11.00 14.50 18.10
6.50 8.60 11.50 15.00 18.50
23.50 24.00
29.60 30.25
38.10 39.00 44.00 44.90
55.60 56.60
美 制管牙
6.70 8.70 11.70 15.25 19.00 21.00 24.50 28.00 30.50 35.50 39.50 45.00 51.00 57.00

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 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 4.83美制外螺纹（2A）常用规格极限尺寸表（粗牙）打印| 推荐| 评分2007-4-20 16:333/8-16 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。