螺丝攻⽛钻孔径对照表

螺丝攻⽛钻孔径对照表公制粗螺纹规格标准径2级牙钻孔径最大最小M1.0×0.250.750.7850.729M1.1×0.250.850.8850.829M1.2×0.250.950.9850.985M1.4×0.31.101.1421.075M1.6×0.351.251.3211.221M1.7×0.351.351.4211.321M1.8×0.351.451.5211.421M2.0×0.41.601.6791.567M2.2×0.451.751.8381.713M2.3×0.41.901.9791.867M2.5×0.452.102.1382.013M2.6×0.452.202.2382.113M3.0×0.52.502.5992.459M3.0×0.62.402.4402.280M3.5×0.62.903.0102.850M4.0×0.73.303.4223.242M4.0×0.753.253.3263.106M4.5×0.753.803.8783.688M5.0×0.84.204.3344.134M5.0×0.94.104.1703.930M6.0×1.05.005.1534.917M7.0×1.06.006.1535.917M8.0×1.256.806.9126.647M9.0×1.257.807.9127.647M10×1.58.508.6768.376M11×1.59.509.6769.376M12×1.7510.3010.44110.106M14×2.012.0012.21011.835M16×2.014.0014.21013.835M18×2.515.5015.74415.294M20×2.517.5017.74417.294M22×2.519.5019.74419.294M24×3.021.0021.25220.752M27×3.024.0024.25223.752M30×3.526.5026.77126.211

美制粗螺纹规格（UNC）标准径2级牙钻孔径最大最小NO.1-64(1.854)1.551.5821.425NO.2-56(2.184)1.801.8711.695NO.3-48(2.515)2.102.1461.941NO.4-40(2.845)2.302.3852.157NO.5-40(3.175)2.602.6972.487NO.6-32(3.505)2.802.8952.642NO8-32(4.166)3.403.533.302NO.10-24(4.826)3.903.9623.683NO.12-24(5.486)4.504.5974.3441/4-205.105.2574.9795/16-186.606.7316.4013/8-168.008.1537.7987/16-149.409.559.1441/2-1310.8011.02310.5929/16-1212.2012.44611.9895/8-1113.6012.86813.3863/4-1016.5018.84016.3077/8-919.5019.76119.177122.2022.60621.9711-1/8-725.0025.34924.6381-1/4-728.2028.52427.8131-3/8-630.8031.11530.3531-1/2-634.0034.29033.5281-3/4-539.5039.82738.9642-4-1/245.2045.59344.679

公制细螺纹规格标准径2级牙钻孔径最大最小M1.0×0.20.800.8210.783M1.1×0.20.900.9210.883M1.2×0.21.001.0210.983M1.4×0.21.201.2211.183M1.6×0.21.401.4211.383M1.7×0.21.451.5001.460M1.8×0.21.601.6211.583M2.0×0.251.751.7851.729M2.2×0.251.951.9851.929M2.3×0.252.052.0612.001M2.5×0.352.202.2212.121M2.6×0.352.202.2462.186M3.0×0.352.702.7212.621M3.5×0.353.203.2213.121M4.0×0.53.503.5993.459M4.5×0.54.004.0993.959M5.0×0.54.504.5994.459M5.5×0.55.005.0994.959M6.0×0.755.305.3785.188M6.0×0.55.505.5505.400M7.0×0.756.306.3786.188M7.0×0.56.506.5506.400M8.0×1.07.007.1536.917M8.0×0.757.307.3787.188M8.0×0.57.507.5207.400M9.0×1.08.008.1537.917M9.0×0.758.308.3788.188M10×1.258.808.9128.647M10×1.09.009.1538.917M10×0.759.309.3789.188M10×0.59.509.5209.400M11×1.010.0010.1539.917M11×0.7510.3010.37810.188M12×1.510.5010.67610.376M12×1.2510.8010.91210.647M12×1.011.0011.15310.917M12×0.511.5011.52011.400M14×1.512.5012.67612.376M14×1.013.0013.15312.917M15×1.513.5013.67613.376M15×1.014.0014.15313.917M16×1.514.5014.67614.376M16×1.015.0015.15314.917M17×1.515.5015.67615.376M17×1.016.0016.15315.917M18×2.016.0016.21015.835M18×1.516.5016.67616.376M18×1.017.0017.15316.917M20×2.018.0018.21017.835M20×1.518.5018.67618.376M20×1.019.0019.15318.917M22×2.020.0020.21019.835M22×1.520.5020.67620.376M22×1.021.0021.15320.917M24×2.022.0022.21021.835M24×1.522.5022.67622.376M24×1.023.0023.15322.917M25×2.023.0023.21022.835M25×1.523.5023.67623.376M25×1.024.0024.15323.917M26×1.524.5024.67624.376M27×2.025.0025.21024.835M27×1.525.5025.67625.376M27×1.026.0026.15325.917M28×2.026.0026.21025.835M28×1.526.5026.67626.376M28×1.027.0027.15326.917M30×3.027.0027.25226.752M30×2.028.0028.21027.835M30×1.528.5028.67628.376M30×1.029.0029.15328.917M32×2.030.0030.21029.835M32×1.530.5030.67630.376M33×3.030.0030.25229.752M33×2.031.0031.21030.835M33×1.531.5031.67631.376M35×1.533.5033.67633.376M36×3.033.0033.25232.752M36×2.034.0034.21033.835M36×1.534.5034.67634.376

美制细螺纹规格（UNC）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.3-56(2.515)2.102.1972.025NO.4-48(2.845)2.402.4582.271NO.5-44(3.175)2.702.7402.551NO.6-40(3.505)2.903.0222.820NO.8-36(4.166)3.503.6063.404NO.10-32(4.826)4.104.1653.963NO.12-28(5.846)4.604.7244.4961/4-285.505.5885.3605/16-246.907.0356.7823/8-248.508.6368.3827/16-209.9010.0339.7291/2-2011.5011.60711.3299/16-1812.9013.08112.7515/8-1814.5014.68114.3513/4-1617.5017.67817.3237/8-1420.5020.67520.2701-1223.2023.57123.1141-1/8-1226.5026.74626.2891-1/4-1229.5029.92129.4641-3/8-1232.8033.09632.6391-1/2-1236.0036.27135.814公制迫牙丝攻钻孔径规格精度等级G4-G6G7-G8G9M1.0×0.250.860.88－M1.1×0.250.960.98－M1.2×0.251.061.08－M1.4×0.31.241.25－M1.6×0.351.411.43－M1.7×0.351.511.53－M1.8×0.351.611.63－M2.0×0.41.781.80－M2.2×0.451.951.98－M2.3×0.42.082.10－M2.5×0.452.252.28－M2.6×0.452.352.38－M3.0×0.52.732.75－M3.5×0.63.173.20－M4.0×0.73.623.653.69M5.0×0.84.564.604.64M6.0×1.05.455.505.55M7.0×1.06.456.506.55M8.0×1.257.317.387.44M10×1.59.189.259.32M10×1.259.319.389.44M12×1.7511.0411.1211.21M12×1.2511.3111.3811.44美制迫牙丝攻钻孔径规格精度等级G4-G6G7-G8G9NO.2-56UNC1.94－－NO.3-482.23－－NO.4-402.50－－NO.5-402.83－－NO.6-323.07－－NO.8-323.733.77－NO.10-244.244.3－NO.12-244.904.96－1/4-20－5.72－5/16-18－7.24－3/8-16－8.748.817/16-14－10.2010.301/2-13－11.2711.82NO.2-64UNF1.97－－NO.3-562.27－－NO.4-482.56－－NO.5-442.86－－NO.6-403.16－－NO.8-363.78－－NO.10-324.394.43－NO.12-284.995.04－1/4-285.855.90－5/16-247.367.41－3/8-24－9.00－7/16-20－10.4810.541/2-20－12.0712.13美制特细螺纹规格(UNEF)标准径2级牙钻孔径最大最小NO.12-324.704.8264.6231/4-325.605.6905.4865/16-327.107.2647.0873/8-328.708.8658.6617/16-2810.2010.33810.1351/2-2811.8011.93811.7099/16-2413.2013.38613.1325/8-2414.8014.98614.7323/4-2017.8017.95817.6787/8-2021.0021.13320.8531-2024.0024.30824.028英制电器螺纹规格钻孔径2BA4.0-4.23BA4BA3.0-3.25BA2.7-2.86BA2.4-2.5英制管螺纹规格标准径钻孔径最大最小PS1/16-286.506.6326.490PS1/8-288.508.6378.495PS1/4-1911.4011.54911.341PS3/8-1915.0015.05414.846PS1/2-1418.5018.77318.489PS3/4-1424.0024.25923.975PS1-1130.2030.47130.111PS1-1/4-1138.8039.13238.772PS1-1/2-1144.8045.02544.665PS2-1156.5056.83656.476英制管螺纹规格标准径有交牙部之长度（最小）中之毋螺牙内径标准长度（最小）中之毋螺牙内径使用纹刀时不用纹刀时PT1/16-286.106.206.2446.384PT1/8-288.108.208.2498.388PT1/4-1910.7011.0010.96211.174PT3/8-1914.2014.5014.44814.658PT1/2-1417.6018.0017.97918.263PT3/4-1423.0023.5023.37823.663PT1-1129.0029.5029.45929.822PT1-1/4-1137.5038.0037.97638.339PT1-1/2-1143.4044.0043.86944.232PT2-1154.9055.5055.41255.844美制管螺纹规格钻孔径NPTNPS使用绞刀时不用绞刀时1/16-276.106.256.351/8-278.338.438.741/4-1810.7211.1311.133/8-1814.2714.2714.681/2-1417.4817.8618.263/4-1422.6323.0123.421-11-1/228.5828.9829.361-1/4-11-1/237.3137.6938.101-1/2-11-1/243.6644.0444.452-11-1/255.5855.9656.36英制螺纹规格(UNEF)钻孔径硬材软材W1/8-402.652.60W5/32-323.253.20W3/16-243.753.70W1/4-205.105.00W5/16-186.606.50W3/8-168.007.90W7/16-149.409.30W1/2-1210.7010.50W9/1