最全面的螺纹加工底孔径对照表.doc

1、最全面的螺纹加工底孔径对照表本文件包含内容公制粗螺纹 2 级牙底孔径对照表公制细螺纹 2 级牙底孔径对照表美制粗螺纹 2 级牙底孔径对照表美制细螺纹 2 级牙底孔径对照表公制迫牙丝攻钻孔径对照表美制迫牙丝攻钻孔径对照表美制特细螺纹 2 级牙底孔径对照表英制电器螺纹底孔径对照表英制管螺纹(PS）底孔径对照表英制管螺纹(PT）底孔径对照表美制管螺纹(NPT、NPS）底孔径对照表英制螺纹(UNEF）底孔径对照表公制螺纹（滚造径）底孔径对照表针车用其所长螺纹（滚造径）底孔径对照表英制圆柱管螺纹(55 度）加工一览表英制锥管螺纹(55 度）加工一览表布锥管螺纹加工一览表美制 UNC、UNF 螺纹参数表惠

2、氏 BSW、BSF 螺纹参数表公制螺纹特殊材质工件加工底孔径对照表非密封管螺纹底孔径对照表英制锥管螺纹和英制锥螺纹攻丝前钻底孔的钻头直径日标英制锥度管螺纹底孔径对照表英制平行管螺纹底孔径对照表美制管用螺纹（使用/不使用铰刀）底孔径对照表圆锥管螺纹（新旧国标、日标）底孔径对照表圆柱管螺纹（新旧国标、日标）底孔径对照表布锥管螺纹（新旧国标、日标）底孔径对照表公制粗牙（铜、铁、不锈钢、铝质工件）底孔径对照表公制细牙（铜、铁、不锈钢、铝质工件）底孔径对照表60 度圆锥管螺纹（钻/镗孔）底孔径对照表60 度圆柱管螺纹（钻/镗孔）底孔径对照表公制粗螺纹2 级牙钻孔径规格 标准径最大 最小M1.00.25

3、0.75 0.785 0.729 M1.10.25 0.85 0.885 0.829 M1.20.25 0.95 0.985 0.985 M1.40.3 1.10 1.142 1.075 M1.60.35 1.25 1.321 1.221 M1.70.35 1.35 1.421 1.321 M1.80.35 1.45 1.521 1.421 M2.00.4 1.60 1.679 1.567 M2.20.45 1.75 1.838 1.713 M2.30.4 1.90 1.979 1.867 M2.50.45 2.10 2.138 2.013 M2.60.45 2.20 2.238 2.113

4、M3.00.5 2.50 2.599 2.459 M3.00.6 2.40 2.440 2.280 M3.50.6 2.90 3.010 2.850 M4.00.7 3.30 3.422 3.242 M4.00.75 3.25 3.326 3.106 M4.50.75 3.80 3.878 3.688 M5.00.8 4.20 4.334 4.134 M5.00.9 4.10 4.170 3.930 M6.01.0 5.00 5.153 4.917 M7.01.0 6.00 6.153 5.917 M8.01.25 6.80 6.912 6.647 M9.01.25 7.80 7.912 7.

5、647 M101.5 8.50 8.676 8.376 M111.5 9.50 9.676 9.376 M121.75 10.30 10.441 10.106 M142.0 12.00 12.210 11.835 M162.0 14.00 14.210 13.835 M182.5 15.50 15.744 15.294 M202.5 17.50 17.744 17.294 M222.5 19.50 19.744 19.294 M243.0 21.00 21.252 20.752 M273.0 24.00 24.252 23.752 M303.5 26.50 26.771 26.211 公制细螺

6、纹2 级牙钻孔径规格 标准径最大 最小M1.00.2 0.80 0.821 0.783M1.10.2 0.90 0.921 0.883M1.20.2 1.00 1.021 0.983M1.40.2 1.20 1.221 1.183M1.60.2 1.40 1.421 1.383M1.70.2 1.45 1.500 1.460 M1.80.2 1.60 1.621 1.583 M2.00.25 1.75 1.785 1.729 M2.20.25 1.95 1.985 1.929 M2.30.25 2.05 2.061 2.001 M2.50.35 2.20 2.221 2.121 M2.60.3

7、5 2.20 2.246 2.186 M3.00.35 2.70 2.721 2.621 M3.50.35 3.20 3.221 3.121 M4.00.5 3.50 3.599 3.459 M4.50.5 4.00 4.099 3.959 M5.00.5 4.50 4.599 4.459 M5.50.5 5.00 5.099 4.959 M6.00.75 5.30 5.378 5.188 M6.00.5 5.50 5.550 5.400 M7.00.75 6.30 6.378 6.188 M7.00.5 6.50 6.550 6.400 M8.01.0 7.00 7.153 6.917 M8

8、.00.75 7.30 7.378 7.188 M8.00.5 7.50 7.520 7.400 M9.01.0 8.00 8.153 7.917 M9.00.75 8.30 8.378 8.188 M101.25 8.80 8.912 8.647 M101.0 9.00 9.153 8.917 M100.75 9.30 9.378 9.188 M100.5 9.50 9.520 9.400 M111.0 10.00 10.153 9.917 M110.75 10.30 10.378 10.188 M121.5 10.50 10.676 10.376 M121.25 10.80 10.912

9、10.647 M121.0 11.00 11.153 10.917 M120.5 11.50 11.520 11.400 M141.5 12.50 12.676 12.376 M141.0 13.00 13.153 12.917 M151.5 13.50 13.676 13.376 M151.0 14.00 14.153 13.917 M161.5 14.50 14.676 14.376 M161.0 15.00 15.153 14.917 M171.5 15.50 15.676 15.376 M171.0 16.00 16.153 15.917 M182.0 16.00 16.210 15.

10、835 M181.5 16.50 16.676 16.376 M181.0 17.00 17.153 16.917 M202.0 18.00 18.210 17.835 M201.5 18.50 18.676 18.376 M201.0 19.00 19.153 18.917 M222.0 20.00 20.210 19.835 M221.5 20.50 20.676 20.376 M221.0 21.00 21.153 20.917 M242.0 22.00 22.210 21.835 M241.5 22.50 22.676 22.376 M241.0 23.00 23.153 22.917

11、 M252.0 23.00 23.210 22.835 M251.5 23.50 23.676 23.376 M251.0 24.00 24.153 23.917 M261.5 24.50 24.676 24.376 M272.0 25.00 25.210 24.835 M271.5 25.50 25.676 25.376 M271.0 26.00 26.153 25.917 M282.0 26.00 26.210 25.835 M281.5 26.50 26.676 26.376 M281.0 27.00 27.153 26.917 M303.0 27.00 27.252 26.752 M3

12、02.0 28.00 28.210 27.835 M301.5 28.50 28.676 28.376 M301.0 29.00 29.153 28.917 M322.0 30.00 30.210 29.835 M321.5 30.50 30.676 30.376 M333.0 30.00 30.252 29.752 M332.0 31.00 31.210 30.835 M331.5 31.50 31.676 31.376 M351.5 33.50 33.676 33.376 M363.0 33.00 33.252 32.752 M362.0 34.00 34.210 33.835 M361.

13、5 34.50 34.676 34.376 美制粗螺纹2 级牙钻孔径规格（UNC） 标准径最大 最小NO.1-64(1.854) 1.55 1.582 1.425NO.2-56(2.184) 1.80 1.871 1.695NO.3-48(2.515) 2.10 2.146 1.941NO.4-40(2.845) 2.30 2.385 2.157NO.5-40(3.175) 2.60 2.697 2.487NO.6-32(3.505) 2.80 2.895 2.642NO.8-32(4.166) 3.40 3.53 3.302NO.10-24(4.826) 3.90 3.962 3.683NO

14、.12-24(5.486) 4.50 4.597 4.3441/4-20 5.10 5.257 4.9795/16-18 6.60 6.731 6.4013/8-16 8.00 8.153 7.7987/16-14 9.40 9.55 9.1441/2-13 10.80 11.023 10.5929/16-12 12.20 12.446 11.9895/8-11 13.60 13.868 13.3863/4-10 16.50 16.840 16.3077/8-9 19.50 19.761 19.1771 22.20 22.606 21.9711-1/8-7 25.00 25.349 24.63

15、81-1/4-7 28.20 28.524 27.8131-3/8-6 30.80 31.115 30.3531-1/2-6 34.00 34.290 33.5281-3/4-5 39.50 39.827 38.9642-4-1/2 45.20 45.593 44.679美制细螺纹2 级牙钻孔径规格（UNF） 标准径最大 最小NO.0-80(1.524) 1.25 1.305 1.182NO.1-72(1.854) 1.55 1.612 1.474NO.2-64(2.184) 1.85 1.912 1.756NO.3-56(2.515) 2.10 2.197 2.025NO.4-48(2.84

16、5) 2.40 2.458 2.271NO.5-44(3.175) 2.70 2.740 2.551NO.6-40(3.505) 2.90 3.022 2.820 NO.8-36(4.166) 3.50 3.606 3.404 NO.10-32(4.826) 4.10 4.165 3.963 NO.12-28(5.846) 4.60 4.724 4.496 1/4-28 5.50 5.588 5.360 5/16-24 6.90 7.035 6.782 3/8-24 8.50 8.636 8.382 7/16-20 9.90 10.033 9.729 1/2-20 11.50 11.607 1

17、1.329 9/16-18 12.90 13.081 12.751 5/8-18 14.50 14.681 14.351 3/4-16 17.50 17.678 17.323 7/8-14 20.50 20.675 20.270 1-12 23.20 23.571 23.114 1-1/8-12 26.50 26.746 26.289 1-1/4-12 29.50 29.921 29.464 1-3/8-12 32.80 33.096 32.639 1-1/2-12 36.00 36.271 35.814 公制迫牙丝攻钻孔径精度等级规格G4-G6 G7-G8 G9M1.00.25 0.86 0

18、.88 M1.10.25 0.96 0.98 M1.20.25 1.06 1.08 M1.40.3 1.24 1.25 M1.60.35 1.41 1.43 M1.70.35 1.51 1.53 M1.80.35 1.61 1.63 M2.00.4 1.78 1.80 M2.20.45 1.95 1.98 M2.30.4 2.08 2.10 M2.50.45 2.25 2.28 M2.60.45 2.35 2.38 M3.00.5 2.73 2.75 M3.50.6 3.17 3.20 M4.00.7 3.62 3.65 3.69M5.00.8 4.56 4.60 4.64M6.01.0 5.

19、45 5.50 5.55M7.01.0 6.45 6.50 6.55M8.01.25 7.31 7.38 7.44M101.5 9.18 9.25 9.32M101.25 9.31 9.38 9.44M121.75 11.04 11.12 11.21M121.25 11.31 11.38 11.44美制迫牙丝攻钻孔径精度等级规格G4-G6 G7-G8 G9NO.2-56UNC 1.94 NO.3-48 2.23 NO.4-40 2.50 NO.5-40 2.83 NO.6-32 3.07 NO.8-32 3.73 3.77 NO.10-24 4.24 4.3 NO.12-24 4.90 4.9

20、6 1/4-20 5.72 5/16-18 7.24 3/8-16 8.74 8.817/16-14 10.20 10.30 1/2-13 11.27 11.82NO.2-64UNF 1.97 NO.3-56 2.27 NO.4-48 2.56 NO.5-44 2.86 NO.6-40 3.16 NO.8-36 3.78 NO.10-32 4.39 4.43 NO.12-28 4.99 5.04 1/4-28 5.85 5.90 5/16-24 7.36 7.41 3/8-24 9.00 7/16-20 10.48 10.541/2-20 12.07 12.13美制特细螺纹2 级牙钻孔径规格(

21、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 10.135 1/2 -28 11.80 11.938 11.709 9/16 -24 13.20 13.386 13.132 5/8 -24 14.80 14.986 14.732 3/4 -20 17.80 17.958 17.678 7/8 -20 21.00 21.133 20.853 1 -20 24.00 24

22、.308 24.028 全球最大中文电子商务平台阿里巴巴 6 年诚信通会员单位江都市华宇刃具厂竭诚为您服务，企业官网链接：http:/。英制电器螺纹规格 钻孔径2BA 4.0-4.23BA 4BA 3.0-3.25BA 2.7-2.86BA 2.4-2.5英制管螺纹钻孔径规格 标准径最大 最小PS 1/16 - 28 6.50 6.632 6.490 PS 1/8 - 28 8.50 8.637 8.495 PS 1/4 - 19 11.40 11.549 11.341 PS 3/8 - 19 15.00 15.054 14.846 PS 1/2 - 14 18.50 18.773 18.48

23、9 PS 3/4 -14 24.00 24.259 23.975 PS 1 - 11 30.20 30.471 30.111 PS 1-1/4 - 11 38.80 39.132 38.772 PS 1-1/2 - 11 44.80 45.025 44.665 PS 2 - 11 56.50 56.836 56.476 英制管螺纹标准径规格使用纹刀时 不用纹刀时有交牙部之长度（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 6.384PT 1/8 - 28 8.10 8.20 8.249 8.388PT 1/4 - 19 10.70

24、11.00 10.962 11.174PT 3/8 - 19 14.20 14.50 14.448 14.658PT 1/2 - 14 17.60 18.00 17.979 18.263PT 3/4 - 14 23.00 23.50 23.378 23.663PT 1- 11 29.00 29.50 29.459 29.822PT 1-1/4 - 11 37.50 38.00 37.976 38.339PT 1-1/2 - 11 43.40 44.00 43.869 44.232PT 2 - 11 54.90 55.50 55.412 55.844美制管螺纹钻孔径NPT规格使用绞刀时 不用绞刀

25、时NPS1/16 - 27 6.10 6.25 6.35 1/8 - 27 8.33 8.43 8.74 1/4 - 18 10.72 11.13 11.13 3/8 - 18 14.27 14.27 14.68 1/2 - 14 17.48 17.86 18.26 3/4 - 14 22.63 23.01 23.42 1 - 11-1/2 28.58 28.98 29.36 1-1/4-11-1/2 37.31 37.69 38.10 1-1/2-11-1/2 43.66 44.04 44.45 2 - 11 - 1/2 55.58 55.96 56.36 英制螺纹钻孔径规格 (UNEF)硬

26、材 软材W 1/8 - 40 2.65 2.60 W 5/32 - 32 3.25 3.20 W 3/16 - 24 3.75 3.70 W 1/4 - 20 5.10 5.00 W 5/16 - 18 6.60 6.50 W 3/8 - 16 8.00 7.90 W 7/16 - 14 9.40 9.30 W 1/2 - 12 10.70 10.50 W 9/16 - 12 12.30 12.00 W 5/8 - 11 13.70 13.50 W 3/4 - 10 16.70 16.50 W 7/8 - 9 19.50 19.30 W1 - 8 22.40 22.00 W 1-1/8 - 7

27、 25.00 24.80 W 1 - 1/4 - 7 28.30 28.00 公制螺纹规格 滚造径M30.5 2.63-2.60M3.00.6 2.56-2.53M3.50.6 3.06-3.03M4.00.7 3.49-3.45M4.00.75 3.45-3.41M4.50.75 3.96-3.92M5.00.8 4.43-4.38M5.00.9 4.36-4.31M6.01.0 5.30-5.25M7.01.0 6.30-6.25M8.01.0 7.28-7.23M8.01.25 7.12-7.07针车用螺纹规格 滚造径SM1/8-40 2.735-2.688SM1/8-44 2.769-

28、2.722SM9/64-40 3.128-3.083SM11/64-40 3.855-3.805SM3/16-32 4.205-4.155SM3/16-28 4.143-4.093SM7/32-32 5.003-4.955SM15/64-28 5.325-5.570SM1/4-40 5.890-5.735SM1/4-28 5.721-5.366SM9/32-28 6.508-6.648SM11/32-28 8.092-8.432SM3/8-28 8.880-8.015SM7/16-28 10.466-10.401SM7/16-16 10.037-9.967SM1/2-20 11.819-11.

29、749SM9/26-20 13.400-13.425G 英制圆柱管螺纹（55）加工一览表小径：d 1=d-1.2807t公称直径 牙/寸 螺距（t） 底孔 深度 螺纹大径1/8 28 0.907 8.50 14.0 9.72901/4 19 1.337 11.50 20.0 13.15803/8 19 1.337 15.00 20.0 16.66301/2 14 1.814 18.50 27.5 20.95605/8 14 1.814 20.50 27.5 22.91203/4 14 1.814 24.00 27.5 26.44207/8 14 1.814 28.00 27.5 30.2020

30、1 11 2.309 30.50 35.0 33.25001 1/8 11 2.309 35.00 35.0 37.89801 1/4 11 2.309 39.00 35.0 41.91201 3/8 11 2.309 41.50 35.0 44.32501 1/2 11 2.309 45.00 35.0 47.80501 3/4 11 2.309 51.00 35.0 53.74802 11 2.309 57.00 35.0 59.61602 1/4 11 2.309 63.00 35.0 65.71202 1/2 11 2.309 72.50 35.0 75.18702 3/4 11 2.

31、309 79.00 35.0 81.5370ZG 英制锥管螺纹（55）加工一览表小径：d 1=d-1.2807t公称直径 牙/寸 螺距 底孔 深度 螺纹大径1/8 28 0.907 8.57-8.27 14.0 9.72901/4 19 1.337 11.5-11.1 20.0 13.15803/8 19 1.337 15.0-14.6 20.0 16.66301/2 14 1.814 18.6-18.2 27.0 20.95603/4 14 1.814 24.1-23.5 27.0 26.44201 11 2.309 30.3-29.6 35.0 33.25001 1/4 11 2.309

32、39.0-38.1 35.0 41.91201 1/2 11 2.309 44.8-44.0 35.0 47.80502 11 2.309 56.7-55.7 35.0 59.61602 1/2 11 2.309 72.2-71.1 35.0 75.8170注意：底孔尺寸均为加工螺纹孔时专用尺寸。深度尺寸均为加工螺纹孔时孔深度尺寸。 （规定为 15 倍螺距）Z 圆锥管螺纹（布锥管螺纹） （60）小径：d 1=d-1.6t公称直径 牙/寸 螺距（t） 底孔 深度 螺纹大径1/16 27 0.941 6.4-6.1 15.0 7.89501/8 27 0.941 8.8-8.5 15.0 10.2

33、7201/4 18 1.411 11.3-11 21.0 13.57203/8 18 1.411 14.8-14.4 21.0 17.05501/2 14 1.814 18.3-17.8 27.0 21.22303/4 14 1.814 23.7-23.1 27.0 26.59801 11 1/2 2.209 29.7-29.1 33.0 33.22801 1/4 11 1/2 2.209 38.5-37.8 33.0 41.98501 1/2 11 1/2 2.209 44.5-43.9 33.0 48.05402 11 1/2 2.209 56.6-55.9 33.0 60.0920美制螺

34、纹（UNC、UNF ）参数表（ 60）小径：d 1=d-1.082532t尺寸代号 公称直 径 in 公称直 径 mm每英寸粗牙数/螺纹粗牙底孔-深度每英寸细牙数/螺距细牙底孔-深度1/4 0.2500 6.35 20/1.27 5.0-19 28/0.91 5.5-145/16 0.3125 7.94 18/1.41 6.5-21 24/1.06 7.0-163/8 0.3750 9.53 16/1.59 7.8-24 24/1.06 8.5-167/16 0.4375 11.11 14/1.81 9.2-27 20/1.27 10.0-191/2 0.5000 12.70 13/1.95

35、10.6-29 20/1.27 11.5-199/16 0.5625 14.29 12/2.12 12.0-32 18/1.41 13.0-215/8 0.6250 15.88 11/2.31 13.5-35 18/1.41 14.5-213/4 0.7500 19.05 10/2.54 16.5-38 16/1.59 17.5-247/8 0.8750 22.23 9/2.82 19.2-42 14/1.81 20.5-271 1.0000 25.40 8/3.18 22.0-48 12/2.12 23.5-321 1/8 1.1250 28.58 7/3.63 25.0-55 12/2.1

36、2 26.5-321 1/4 1.2500 31.75 7/3.63 28.0-55 12/2.12 29.5-321 3/8 1.3750 34.93 6/4.23 30.5-64 12/2.12 33.0-321 1/2 1.5000 38.10 6/4.23 38.0-64 12/2.12 36.0-321 3/4 1.7500 44.45 5/5.08 39.0-76 2 2.0000 50.80 4.5/5.64 45.0-85 注意：in 为英寸符号，一英寸等于 25.4 毫米。底孔尺寸均为加工螺纹孔时专用尺寸。深度尺寸均为加工螺纹孔时孔深度尺寸。 （规定为 15 倍螺距）惠氏螺纹

37、（BSW、BSF）参数表（55）小径：d 1=d-1.280655t公称直径 in公称直径mm每英寸粗牙数/螺距粗牙底孔-深度每英寸细牙数/螺距细牙底孔-深度1/8 3.18 40/0.635 2.4-10 3/16 4.76 24/1.058 3.4-16 32/0.794 3.8-127/32 5.56 28/0.907 4.4-141/4 6.35 20/1.270 4.8-19 26/0.977 5.1-159/32 7.14 26/0.977 6.0-155/16 7.94 18/1.411 6.2-21 22/1.155 6.5-173/8 9.53 16/1.588 7.5-24

38、 20/1.270 8.0-197/16 11.11 14/1.814 8.8-27 18/1.411 9.4-221/2 12.70 12/2.117 10.0-32 16/1.588 10.8-249/16 14.29 12/2.117 11.6-32 16/1.588 12.4-245/8 15.88 11/2.309 13.0-35 14/1.814 13.6-2711/16 17.46 11/2.309 14.5-35 14/1.814 15.2-273/4 19.05 10/2.540 15.8-38 12/2.117 16.4-327/8 22.23 9/2.822 18.6-4

39、2 11/2.309 19.4-351 25.40 8/3.175 21.4-48 10/2.540 22.2-381 1/8 28.58 7/3.629 24.0-54 9/2.822 25.0-421 1/4 31.75 7/3.629 27.2-54 9/2.822 28.2-421 3/8 34.93 8/3.175 31.0-481 1/2 38.10 6/4.233 32.8-63 8/3.175 34.2-481 5/8 41.28 8/3.175 37.4-481 3/4 44.45 5/5.080 38.0-76 7/3.629 40.0-542 50.80 4.5/5.64

40、4 43.6-85 7/3.629 46.2-542 1/4 57.15 4/6.350 49.0-95 6/4.233 51.8-632 1/2 63.50 4/6.350 55.4-95 6/4.233 58.2-63注意：in 为英寸符号，一英寸等于 25.4 毫米。底孔尺寸均为加工螺纹孔时专用尺寸。深度尺寸均为加工螺纹孔时光孔深度尺寸。 （规定为 15 倍螺距）惠氏螺纹为紧固件螺纹。公称直径为螺纹大径。普通螺纹攻螺纹前底孔的钻头直径非密封管螺纹攻螺纹前钻底孔的钻头直径螺纹公称直径1/8 1/4 3/8 1/2 3/4 1 1 1/4 1 3/8 1 1/2（“）每 25.4mm内牙数2

41、8 19 19 14 14 11 11 11 11钻头直径（mm）8.8 11.7 15.2 18.9 24.4 30.6 39.2 41.3 45.1英制锥管螺纹和英制锥螺纹攻丝前钻底孔的钻头直径英制锥管螺纹 英制锥螺纹公称直径 每 25.4mm 钻头直径 公称直径 每 25.4mm 钻头直径（“） 内牙数 （mm） （“） 内牙数 （mm）1/8 28 8.4 1/8 27 8.61/4 19 11.2 1/4 18 11.13/8 19 14.7 3/8 18 14.51/2 14 18.3 1/2 14 17.93/4 14 23.6 3/4 14 23.21 11 29.7 1 11

42、1/2 29.21 1/4 11 38.3 1 1/4 111/2 37.91 1/2 11 44.1 1 1/2 111/2 43.92 11 55.8 2 111/2 56螺纹底孔明细公 制螺纹规格 螺距 钻孔直径 钻孔深度 螺纹深度M3 0.5 2.5 8 5M4 0.7 3.3 8 5M5 0.8 4.2 14 11M6 1 5 15 12M8 1.25 6.7 18 15M10 1.5 8.5 20 17M12 1.75 10.3 20 17M14 2 12 25 22M16 2 14 25 22M18 2.5 15.5 M20 2.5 17.5 M22 2.5 19.5 M24 3

43、 21 M27 3 24 M30 3.5 26.5 M33 3.5 29.5 M36 4 32 M101 1 9 M121.5 1.5 10.5 M141.5 1.5 12.5 18 16M161.5 1.5 14.5 20 17M181.5 1.5 16.5 20 17M201.5 1.5 18.5 20 17M221.5 1.5 20.5 20 17M271.5 1.5 25.5 22 17M272 2 25 M301.5 1.5 28.5 25 22M332 2 31 25 22M362 2 34 25 22M422 2 40 30 25英 制螺纹规格 钻孔直径 钻孔深度 螺纹深度Z1/

44、16“ 6.4 12 8ZG1/16“ 6.6 12 8G1/16“ 6.6 12 8Z1/8“ 8.7 17 12ZG1/8“ 8.6 17 12G1/8“ 8.6 17 12Z1/4“ 11.3 17 14ZG1/4“ 11.4 17 14G1/4“ 11.4 17 14Z3/8“ 14.8 20 17ZG3/8“ 15 20 17G3/8“ 15 20 17Z1/2“ 18.3 22 18ZG1/2“ 18.6 22 18G1/2“ 18.6 22 18Z3/4“ 23.7 22 18ZG3/4“ 24.1 22 18G3/4“ 24.1 22 18Z1“ 29.7 30 25ZG1“

45、30.3 30 25G1“ 30.3 30 25Z11/4“ 38.5 ZG11/4“ 39 G11/4“ 39 Z11/2“ 44.5 ZG11/2“ 44.8 G11/2“ 44.8 Z2“ 56.6 ZG2“ 56.7 G2“ 56.7 螺纹底孔直径表英制锥度管用螺纹JIS B0203 JIS B0203 JIS B 2301锥度内螺纹Rc(PT) 平行管内螺纹 Rp(PS) 锥度管内螺纹管用螺纹规格计算数值底孔直径 计算数值 底孔直径 计算数值 底孔直径1/16 28 6.23 6.2 6.49 6.5 1/8 28 8.235 8.2 8.495 8.5 8.191 8.21/4 1

46、9 10.941 10.9 11.341 11.4 10.945 10.93/8 19 14.428 14.4 14.846 14.9 14.388 14.41/2 14 17.95 18 18.489 18.5 17.943 183/4 14 23.349 23 23.975 24 23.305 231 11 19.423 29 30.111 30 29.353 291 1/4 11 37.94 38 38.772 39 37.89 381 1/2 11 43.833 44 44.565 45 43.72 432 11 55.412 55 56.476 56 55.406 552 1/2 1

47、1 70.701 71 72.009 72 70.788 703 11 83.201 83 84.709 85 83.364 833 1/2 11 95.547 96 97.155 97 95.747 954 11 107.834 108 109.855 110 108.322 1085 11 133.11 133 135.255 135 133.597 1336 11 158.51 159 160.655 161 158.81 158英制平行管用螺纹（G、PF）内螺纹最小径（参考）管用螺纹规格底孔钻头直径最大尺寸 最小尺寸G 1/16 28 6.7 6.843 6.561G(PF) 1/8

48、28 8.7 8.848 8.566G(PF) 1/4 19 11.7 11.89 11.445G(PF) 3/8 19 15.2 15.395 14.95G(PF) 1/2 14 19 19.172 18.631G(PF) 5/8 14 21 21.13 20.589G(PF) 3/4 14 24.5 24.658 24.117G(PF) 7/8 14 28.2 28.418 27.877G(PF) 1 11 30.6 30.931 30.291G(PF) 1 1/8 11 35.2 35.579 34.939G(PF) 1 1/4 11 39.2 39.592 38.952G(PF) 1 1/2 11 45 45.485 44.845G(PF) 1 3/4 11 51 51.428 50.788G(PF) 2 11 57 57.296 56.656G(PF) 2 1/4 11 63 63.392 62.75