螺丝攻对照表

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级牙公 制 粗 螺 纹2级牙钻孔径规格标准径最大最小M1.0*0.250.750.7850.729M1.1*0.250.850.8850.829M1.2*0.250.950.9850.929M1.4*0.301.001.1421.075M1.6*0.351.251.3211.221M1.7*0.351.351.4211.321M1.8*0.351.451.5211.421M2.0*0.401.601.6791.567M2.2*0.451.751.8381.713M2.3*0.401.901.9791.867M2.5*0.452.102.1382.013M2.6*0.452.202.2382.113M3.0*0.502.502.5992.459M3.0*0.602.402.4402.280M3.5*0.602.903.0102.850M4.0*0.703.303.4223.242M4.0*0.753.253.3263.106M4.5*0.753.803.8783.688M5.0*0.804.204.3344.134M5.0*0.904.104.1703.930M6.0*1.005.005.1534.917M7.0*1.006.006.1535.917M8.0*1.256.806.9126.647M9.0*1.257.807.9127.647M10*1.508.508.6768.376M11*1.509.509.6769.376M12*1.7510.3010.44110.160M14*2.0012.0012.21011.835M16*2.0014.0014.21013.835M18*2.5015.5015.74415.294M20*2.5017.5017.74417.294M22*2.5019.5019.74419.294M24*3.0021.0021.25220.752M27*3.0024.0024.25223.752M30*3.5026.5026.77126.211公 制 细 螺 纹规格标准率2级牙钻孔径最大最小M1.0*0.20.800.8210.783M1.1*0.20.900.9210.883M1.2*0.21.001.0210.983M1.4*0.21.201.2211.183M1.6*0.21.401.4211.383M1.7*0.21.451.5001.460M1.8*0.21.601.6211.583M2.0*0.251.751.7851.729M2.2*0.251.951.9851.929M2.3*0.252.052.6102.001M2.5*0.352.202.2212.121M2.6*0.352.202.2462.186M3.0*0.352.702.7212.621M3.5*0.353.203.2213.121M4.0*0.53.503.5993.459M4.5*0.54.004.0993.959M5.0*0.54.504.5994.459M5.5*0.55.005.0994.959M6.0*0.755.305.3785.188M6.0*0.55.505.5505.400M7.0*0.756.306.3786.188M7.0*0.56.506.5506.400M8.0*1.07.007.1536.917M8.0*0.757.307.3787.188M8.0*0.57.507.5207.400M9.0*1.08.008.1537.917M9.0*0.758.308.3788.188M10*1.258.808.9128.647M10*1.09.009.1538.917M10*0.759.309.3789.188M10*0.59.509.5209.400M11*1.010.0010.1538.917M11*0.7510.3010.37810.188M12*1.5010.5010.67610.376M12*1.2510.8010.91210.647公 制 细 螺 纹2级牙钻孔径规格标准径最大最小M12*1.011.0011.15310.917M12*0.511.5011.52011.400M14*1.512.5012.67612.376M14*1.013.0013.15312.917M15*1.513.5013.67613.376M15*1.014.0014.15313.917M16.1.514.5014.67614.376M16*1.015.0015.15314.917M17*1.515.5015.67615.376M17*1.016.0016.15315.917M18*2.016.0016.21015.835M18*1.516.5016.67616.976M18*1.017.0017.15316.917M20*2.018.0018.21017.835M20*1.518.5018.67618.376M20*1.019.0019.15318.917M22*2.020.0020.21019.835M22*1.520.5020.67620.376M22*1.021.0021.15320.917M24*2.022.0022.21021.835M24*1.522.5022.67622.376M24*1.023.0023.15322.917M25*2.023.0023.21022.835M25*1.523.5023.67623.376M25*1.024.0024.15323.917M26*1.524.5024.67624.376M27*2.025.0025.21024.835M27*1.525.5025.67625.376M27*1.026.0026.15325.917M28*2.026.0026.21025.835M28*1.526.5026.67626.376M28*1.027.0027.15326.917M30*3.027.0027.15226.752M30*2.028.0028.21027.835M30*1.528.5028.67628.376M30*1.029.0029.15328.917M32*2.030.0030.21029.835M32*1.530.5030.67630.376M33*1.030.0030.25229.752M33*2.031.0031.21030.835M33*1.531.5031.67631.376M35*1.533.5033.67633.376M36*3.033.0033.25232.752M36*2.034.0034.21033.835M36*1.534.5034.67634.376美 制 细 螺 纹规格(UNF)标准径2级牙钻孔径最大最小No 0-80(1.524)1.251.3051.182No 1-72(1.854)1.551.6121.474No 2-64(2.184)1.851.9121.756No 3-58(2.515)2.102.1972.025No 4-48(2.845)2.402.4582.271No 5-44(3.175)2.702.7402.551No 6-40(3.506)2.903.0222.820No 8-36(4.166)3.503.6063.404No 10-32(4.826)4.104.1653.963No 12-28(5.846)4.604.7244.4961/4 - 285.505.5885.3605/16 - 246.907.0356.7823/8 - 248.508.6368.3827/16 - 209.9010.0339.7291/2 - 2011.5011.60711.3299/16 - 1812.9013.08112.7515/8 - 1814.5014.68114.3513/4 - 1617.5017.67817.3237/8 - 1420.5020.57520.2701 - 1223.2023.57123.1141-1/8 - 1226.5026.74626.2891-1/4 - 1229.5029.92129.4641-3/8 - 1232.8033.09632.6391-1/2 - 1236.0036.27135.814公制迫牙丝攻钻孔径美制迫牙丝攻钻孔径精 度 等 级精 度 等 级规格规格G4-G6G7-G8G9G4-G6G7-G8G9M1.0*0.250.860.88-No 2 - 56UNC1.94--M1.1*0.250.960.98-No 3 - 482.23--M1.2*0.251.061.08-No 4 - 402.50--M1.4*0.301.241.25-No 5 - 402.83--M1.6*0.351.411.43-No 6 - 323.07--M1.7*0.351.511.53-No 8 - 323.733.77-M1.8*0.351.611.63-No10 - 244.244.30-M2.0*0.401.781.80-No12 - 244.904.96-M2.2*0.451.951.98-1/4 - 20-5.72-M2.3*0.402.082.10-5/16 - 18-7.24-M2.5*0.452.252.28-3/8 - 16-8.748.81M2.6*0.452.352.38-7/16 - 14-10.2010.30M3.0*0.502.732.75-1/2 - 13-11.2711.82M3.5*0.603.173.20-No 2 - 64UNF1.97--M4.0*0.703.623.653.69No 3 - 562.27--M5.0*0.804.564.604.64No 4 - 482.56--M6.0*1.005.455.505.55No 5 - 442.66--M7.0*1.006.456.506.55No 6 - 403.16--M8.0*1.257.317.387.44No 8 - 363.78--M10*1.509.189.259.32No 10- 324.394.43-M10*1.259.319.389.44No 12 -284.995.04-M12*1.7511.0411.1211.211/4 -285.855.90-M12*1.2511.3111.3811.445/16 -247.367.41-3/8 -24-9.00-注:迫牙丝攻之钻孔径,在上表所列之数值,由于7/16 -20-10.4810.54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1/2 -20-12.0712.13增减若干。英 制 管 螺 纹美 制 粗 螺 纹钻孔径规格(UNC)标准径2级牙钻孔径规格标准径最大最小最大最小PS 1/16 - 286.506.6326.490No 1-64(1.854)1.551.5821.425PS 1/8 - 288.508.6378.495No 2-56(2.184)1.801.8711.695PS 1/4 - 1911.4011.54911.341No 3-48(2.515)2.102.1461.941PS 3/8 - 1915.0015.05414.846No 4-40(2.845)2.302.3852.157PS 1/2 - 1418.5018.77318.489No 5-40(3.175)2.602.6972.487PS 3/4 - 1424.0024.25923.975No 6-32(3.505)2.802.8952.642PS 1 - 1130.2030.47130.111No 8-32(4.166)3.403.5303.302PS 1-1/4 - 1138.8039.13238.772No 10-24(4.826)3.903.9623.683PS 1-1/2 - 1144.8045.02544.665No 12-24(5.486)4.504.5974.344PS 2 - 1156.5056.83656.476 1/4 - 205.105.2574.979 5/16 - 186.606.7316.401 3/8 - 168.008.1537.798 7/16 - 149.409.5509.144英 制 管 螺 纹 1/2 - 1310.8011.02310.592标准径有效牙部之12.2012.44611.989规格长度（最 9/16 - 12使用绞刀时不使用绞刀时小）中之毋螺牙内径 5/8 - 1113.6012.86813.386PT 1/16 - 286.106.206.244 3/4 - 1016.5018.84016.307PT 1/8 - 288.108.208.249 7/8 - 919.5019.76119.177PT 1/4 - 1910.7011.0010.962 1 - 822.2022.60621.971PT 3/8 - 1914.2014.5014.448 1-1/8 - 725.0025.34924.638PT 1/2 - 1417.6018.0017.979 1-1/4 - 728.2028.52427.813PT 3/4 - 1423.0023.5023.378 1-3/8 - 630.8031.11530.353PT 1 - 1129.0029.5029.459 1-1/2 - 634.0034.29033.528PT 1-1/4 - 1137.5038.0037.976 1-3/4 - 539.5039.82738.964PT 1-1/2 - 1143.4044.0043.8692 - 4-1/245.2045.59344.679PT 2 - 1154.9055.5055.412美 制 特 细 螺 纹英 制 管 螺 纹规格(UNC)标准径2级牙钻孔径钻孔径最大最小规格NPTNo 12 - 324.7004.8264.623使用绞刀时NPS不使用绞刀时1/4 - 325.6005.6905.4861/16 - 276.106.256.355/16 - 327.1007.2647.0871/8 - 278.338.438.743/8 - 328.7008.8658.6611/4 -1810.7211.1311.137/16 - 2810.20010.33810.1353/8 -1814.2714.2714.681/2 - 2811.80011.93811.7091/2 -1417.4817.8618.269/16 - 2413.20013.38613.1323/4 -1422.6323.0123.425/8 - 2414.80014.98614.7321 -11-1/228.5828.9829.363/4 - 2017.80017.95817.6781-1/4-11-1/237.3137.6938.107/8 - 2021.00021.13320.8531-1/2-11-1/243.6644.0444.451 - 2024.00024.30824.0282 -11-1/255.5855.9656.36英 制 螺 纹钻孔径规格硬材软材W1/8 - 402.652.60W5/32 - 323.253.20W3/16 - 243.753.70W1/4 - 205.105.00W5/16 - 18 6.606.50W3/8 - 168.007.90W7/16 - 149.409.30W1/2 - 1210.7010.50W9/16 - 1212.3012.00W5/8 - 1113.7012.50W3/4 - 1016.7013.50W7/8 - 919.5016.50W1 - 822.4019.30W1-1/8 - 725.0024.80W1-1/4 - 728.3028.00针车用螺纹规格滚造径SM1/8 - 402.735 - 2.688SM1/8 - 442.769 - 2.722SM9/64 - 403.128 - 3.083SM11/64 - 403.855 - 3.805SM3/16 - 324.205 - 4.155SM3/16 - 284.143 - 4.093SM7/32 - 325.003 - 4.955SM15/64 - 285.325 - 5.570SM1/4 - 405.890 - 5.735SM1/4 - 285.721 - 5.366SM9/32 - 286.508 - 5.648SM11/32 - 288.092 - 8.432SM3/8 - 288.880 - 8.015SM7/16 - 2810.466 - 10.401SM7/16 - 1610.037 - 9.967SM1/2 - 2011.819 - 11.749SM9/16 - 2013.400 - 13.425公制螺纹规格滚造径M3*0.52.63 - 2.60M3.0*0.62.56 - 2.50M3.5*0.63.06 - 3.03M4.0*0.73.49 - 3.45M4.0*0.753.45 - 3.41M4.5*.753.96 - 3.92M5.0*0.84.43 - 4.38M5.0*0.94.36 - 4.31M6.0*1.05.30 - 5.25M7.0*1.06.30 - 6.25M8.0*1.07.28 - 7.23M8.0*1.257.12 - 7.07英制电器螺纹规格钻孔径2BA4.0 - 4.23BA4BA3.0 - 3.25BA2.7 - 2.86BA2.4 - 2.5