螺丝攻牙钻孔径和滚造径对照表

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；而依抿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，应视实际壮况适当的变更钻头直径，本表是依据2级牙

最大最小最大最小G4-G6G7-G8G9G4-G6G7-G8G9

硬材软材M1.0*0.250.750.7850.729M12*1.011.0011.15310.917M1.0*0.250.860.88-No 2 - 56UNC 1.94--

W1/8 - 40 2.65 2.60M1.1*0.250.850.8850.829M12*0.511.5011.52011.400M1.1*0.250.960.98-No 3 - 48 2.23--

W5/32 - 32 3.25 3.20M1.2*0.250.950.9850.929M14*1.512.5012.67612.376M1.2*0.25 1.06 1.08-No 4 - 40 2.50--

W3/16 - 24 3.75 3.70M1.4*0.30 1.00 1.142 1.075M14*1.013.0013.15312.917M1.4*0.30 1.24 1.25-No 5 - 40 2.83--

W1/4 - 20 5.10 5.00M1.6*0.35 1.25 1.321 1.221M15*1.513.5013.67613.376M1.6*0.35 1.41 1.43-No 6 - 32 3.07--

W5/16 - 18 6.60 6.50M1.7*0.35 1.35 1.421 1.321M15*1.014.0014.15313.917M1.7*0.35 1.51 1.53-No 8 - 32 3.73 3.77-

W3/8 - 168.007.90M1.8*0.35 1.45 1.521 1.421M16.1.514.5014.67614.376M1.8*0.35 1.61 1.63-No10 - 24 4.24 4.30-

W7/16 - 149.409.30M2.0*0.40 1.60 1.679 1.567M16*1.015.0015.15314.917M2.0*0.40 1.78 1.80-No12 - 24 4.90 4.96-

W1/2 - 1210.7010.50M2.2*0.45 1.75 1.838 1.713M17*1.515.5015.67615.376M2.2*0.45 1.95 1.98-1/4 - 20- 5.72-

W9/16 - 1212.3012.00M2.3*0.40 1.90 1.979 1.867M17*1.016.0016.15315.917M2.3*0.40 2.08 2.10-5/16 - 18-7.24-

W5/8 - 1113.7012.50M2.5*0.45 2.10 2.138 2.013M18*2.016.0016.21015.835M2.5*0.45 2.25 2.28-3/8 - 16-8.748.81

W3/4 - 1016.7013.50M2.6*0.45 2.20 2.238 2.113M18*1.516.5016.67616.976M2.6*0.45 2.35 2.38-7/16 - 14-10.2010.30

W7/8 - 919.5016.50M3.0*0.50 2.50 2.599 2.459M18*1.017.0017.15316.917M3.0*0.50 2.73 2.75-1/2 - 13-11.2711.82

W1 - 822.4019.30M3.0*0.60 2.40 2.440 2.280M20*2.018.0018.21017.835M3.5*0.60 3.17 3.20-No 2 - 64UNF 1.97--

W1-1/8 - 725.0024.80M3.5*0.60 2.90 3.010 2.850M20*1.518.5018.67618.376M4.0*0.70 3.62 3.65 3.69No 3 - 56 2.27--

W1-1/4 - 728.3028.00M4.0*0.70 3.30 3.422 3.242M20*1.019.0019.15318.917M5.0*0.80 4.56 4.60 4.64No 4 - 48 2.56--

M4.0*0.75 3.25 3.326 3.106M22*2.020.0020.21019.835M6.0*1.00 5.45 5.50 5.55No 5 - 44 2.66--

M4.5*0.75 3.80 3.878 3.688M22*1.520.5020.67620.376M7.0*1.00 6.45 6.50 6.55No 6 - 40 3.16--

M5.0*0.80 4.20 4.334 4.134M22*1.021.0021.15320.917M8.0*1.257.317.387.44No 8 - 36 3.78--

M5.0*0.90 4.10 4.170 3.930M24*2.022.0022.21021.835M10*1.509.189.259.32No 10- 32 4.39 4.43-

M6.0*1.00 5.00 5.153 4.917M24*1.522.5022.67622.376M10*1.259.319.389.44No 12 -28 4.99 5.04-

M7.0*1.00 6.00 6.153 5.917M24*1.023.0023.15322.917M12*1.7511.0411.1211.211/4 -28 5.85 5.90-

SM1/8 - 40 2.735 - 2.688M8.0*1.25 6.80 6.912 6.647M25*2.023.0023.21022.835M12*1.2511.3111.3811.445/16 -247.367.41-

SM1/8 - 44 2.769 - 2.722M9.0*1.257.807.9127.647M25*1.523.5023.67623.3763/8 -24-9.00-

SM9/64 - 40 3.128 - 3.083M10*1.508.508.6768.376M25*1.024.0024.15323.9177/16 -20-10.4810.54

SM11/64 - 40 3.855 - 3.805M11*1.509.509.6769.376M26*1.524.5024.67624.3761/2 -20-12.0712.13

SM3/16 - 32 4.205 - 4.155M12*1.7510.3010.44110.160M27*2.025.0025.21024.835

SM3/16 - 28 4.143 - 4.093M14*2.0012.0012.21011.835M27*1.525.5025.67625.376SM7/32 - 32 5.003 - 4.955M16*2.0014.0014.21013.835M27*1.026.0026.15325.917

SM15/64 - 28 5.325 - 5.570M18*2.5015.5015.74415.294M28*2.026.0026.21025.835

SM1/4 - 40 5.890 - 5.735M20*2.5017.5017.74417.294M28*1.526.5026.67626.376SM1/4 - 28 5.721 - 5.366M22*2.5019.5019.74419.294M28*1.027.0027.15326.917最大最小

SM9/32 - 28 6.508 - 5.648M24*3.0021.0021.25220.752M30*3.027.0027.15226.752最大最小PS 1/16 - 28 6.50 6.632 6.490

SM11/32 - 288.092 - 8.432M27*3.0024.0024.25223.752M30*2.028.0028.21027.835No 1-64(1.854) 1.55 1.582 1.425PS 1/8 - 288.508.6378.495

SM3/8 - 288.880 - 8.015M30*3.5026.5026.77126.211M30*1.528.5028.67628.376No 2-56(2.184) 1.80 1.871 1.695PS 1/4 - 1911.4011.54911.341

SM7/16 - 2810.466 - 10.401M30*1.029.0029.15328.917No 3-48(2.515) 2.10 2.146 1.941PS 3/8 - 1915.0015.05414.846

SM7/16 - 1610.037 - 9.967M32*2.030.0030.21029.835No 4-40(2.845) 2.30 2.385 2.157PS 1/2 - 1418.5018.77318.489

SM1/2 - 2011.819 - 11.749M32*1.530.5030.67630.376No 5-40(3.175) 2.60 2.697 2.487PS 3/4 - 1424.0024.25923.975

SM9/16 - 2013.400 - 13.425最大最小M33*1.030.0030.25229.752No 6-32(3.505) 2.80 2.895 2.642PS 1 - 1130.2030.47130.111

M1.0*0.20.800.8210.783M33*2.031.0031.21030.835No 8-32(4.166) 3.40 3.530 3.302PS 1-1/4 - 1138.8039.13238.772

M1.1*0.20.900.9210.883M33*1.531.5031.67631.376No 10-24(4.826) 3.90 3.962 3.683PS 1-1/2 - 1144.8045.02544.665

M1.2*0.2 1.00 1.0210.983M35*1.533.5033.67633.376No 12-24(5.486) 4.50 4.597 4.344PS 2 - 1156.5056.83656.476

M1.4*0.2 1.20 1.221 1.183M36*3.033.0033.25232.752 1/4 - 20 5.10 5.257 4.979

M1.6*0.2 1.40 1.421 1.383M36*2.034.0034.21033.835 5/16 - 18 6.60 6.731 6.401

M1.7*0.2 1.45 1.500 1.460M36*1.534.5034.67634.376 3/8 - 168.008.1537.798

M3*0.5 2.63 - 2.60M1.8*0.2 1.60 1.621 1.583 7/16 - 149.409.5509.144M3.0*0.6 2.56 - 2.50M2.0*0.25 1.75 1.785 1.729

1/2 - 1310.8011.02310.592M3.5*0.6 3.06 - 3.03M2.2*0.25 1.95 1.985 1.929 9/16 - 1212.2012.44611.989使用绞刀时不使用绞刀时M4.0*0.7 3.49 - 3.45M2.3*0.25 2.05 2.610 2.001

5/8 - 1113.6012.86813.386PT 1/16 - 28 6.10 6.20 6.244 6.384

M4.0*0.75 3.45 - 3.41M2.5*0.35 2.20 2.221 2.121最大最小 3/4 - 1016.5018.84016.307PT 1/8 - 288.108.208.2498.388

M4.5*.75 3.96 - 3.92M2.6*0.35 2.20 2.246 2.186No 0-80(1.524) 1.25 1.305 1.182 7/8 - 919.5019.76119.177PT 1/4 - 1910.7011.0010.96211.174

M5.0*0.8 4.43 - 4.38M3.0*0.35 2.70 2.721 2.621No 1-72(1.854) 1.55 1.612 1.474 1 - 822.2022.60621.971PT 3/8 - 1914.2014.5014.44814.658

M5.0*0.9 4.36 - 4.31M3.5*0.35 3.20 3.221 3.121No 2-64(2.184) 1.85 1.912 1.756 1-1/8 - 725.0025.34924.638PT 1/2 - 1417.6018.0017.97918.263

M6.0*1.0 5.30 - 5.25M4.0*0.5 3.50 3.599 3.459No 3-58(2.515) 2.10 2.197 2.025 1-1/4 - 728.2028.52427.813PT 3/4 - 1423.0023.5023.37823.663

M7.0*1.0 6.30 - 6.25M4.5*0.5 4.00 4.099 3.959No 4-48(2.845) 2.40 2.458 2.271 1-3/8 - 630.8031.11530.353PT 1 - 1129.0029.5029.45929.822

M8.0*1.07.28 - 7.23M5.0*0.5 4.50 4.599 4.459No 5-44(3.175) 2.70 2.740 2.551 1-1/2 - 634.0034.29033.528PT 1-1/4 - 1137.5038.0037.97638.339

M8.0*1.257.12 - 7.07M5.5*0.5 5.00 5.099 4.959No 6-40(3.506) 2.90 3.022 2.820 1-3/4 - 539.5039.82738.964PT 1-1/2 - 1143.4044.0043.86944.232

M6.0*0.75 5.30 5.378 5.188No 8-36(4.166) 3.50 3.606 3.404 2 - 4-1/245.2045.59344.679PT 2 - 1154.9055.5055.41255.844

M6.0*0.5 5.50 5.550 5.400No 10-32(4.826) 4.10 4.165 3.963

M7.0*0.75 6.30 6.378 6.188No 12-28(5.846) 4.60 4.724 4.496

M7.0*0.5 6.50 6.550 6.4001/4 - 28 5.50 5.588 5.360M8.0*1.07.007.153 6.9175/16 - 24 6.907.035 6.782

M8.0*0.757.307.3787.1883/8 - 248.508.6368.382最大最小M8.0*0.57.507.5207.4007/16 - 209.9010.0339.729No 12 - 32 4.700 4.826 4.623使用绞刀时不使用绞刀时2BA 4.0 - 4.2M9.0*1.08.008.1537.9171/2 - 2011.5011.60711.3291/4 - 32 5.600 5.690 5.4861/16 - 27 6.10 6.25 6.35

3BA M9.0*0.758.308.3788.1889/16 - 1812.9013.08112.7515/16 - 327.1007.2647.0871/8 - 278.338.438.74

4BA 3.0 - 3.2M10*1.258.808.9128.6475/8 - 1814.5014.68114.3513/8 - 328.7008.8658.6611/4 -1810.7211.1311.13

5BA 2.7 - 2.8M10*1.09.009.1538.9173/4 - 1617.5017.67817.3237/16 - 2810.20010.33810.1353/8 -1814.2714.2714.68

6BA 2.4 - 2.5M10*0.759.309.3789.1887/8 - 1420.5020.57520.2701/2 - 2811.80011.93811.7091/2 -1417.4817.8618.26

M10*0.59.509.5209.400 1 - 1223.2023.57123.1149/16 - 2413.20013.38613.1323/4 -1422.6323.0123.42

M11*1.010.0010.1538.9171-1/8 - 1226.5026.74626.2895/8 - 2414.80014.98614.732 1 -11-1/228.5828.9829.36

M11*0.7510.3010.37810.1881-1/4 - 1229.5029.92129.4643/4 - 2017.80017.95817.6781-1/4-11-1/237.3137.6938.10

M12*1.5010.5010.67610.3761-3/8 - 1232.8033.09632.6397/8 - 2021.00021.13320.8531-1/2-11-1/243.6644.0444.45

M12*1.2510.8010.91210.6471-1/2 - 1236.0036.27135.814 1 - 2024.00024.30824.028 2 -11-1/255.5855.9656.36规格钻孔径规格滚造径英制电器螺纹公制螺纹规格滚造径2级牙钻孔径NPT

英 制 管 螺 纹

英 制 管 螺 纹

规格标准径有效牙部之长度（最小）中之毋螺牙内径标准长度（最小）中

之毋螺牙内径

规格(UNC)标准径规格标准率规格(UNF)标准径2级牙钻孔径规格2级牙钻孔径规格(UNC)标准径2级牙钻孔径注: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,亦精增减若干。

规格2级牙钻孔径公 制 粗 螺 纹公 制 细 螺 纹规格精 度 等 级标准径2级牙钻孔径

规格标准径美 制 粗 螺 纹美制迫牙丝攻钻孔径

规格NPS

规格英 制 管 螺 纹

钻孔径

精 度 等 级

标准径公制迫牙丝攻钻孔径美 制 特 细 螺 纹钻孔径螺丝攻牙钻孔径和滚造径对照表钻孔径

公 制 细 螺 纹美 制 细 螺 纹英 制 螺 纹针车用螺纹规格