超全螺纹攻牙钻孔直径和滚造直径对照表，很全！
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本表所推选钻头孔径，是针对攻牙加工时，能够很容易的了解钻头直径，而依据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，精度有很大影响，所以使用本表之钻孔径，若有不当之处，应实际状况适当的变更钻头直径，本表依据2级牙制订。公 制 粗 螺 纹规格标准径2级牙钻孔径最大最小M1.0×0.250.750.7850.729M1.1×0.250.850.8850.829M1.2×0.250.950.9850.929M1.4×0.31.101.1421.075M1.6×0.351.251.3211.221M1.7×0.351.351.4211.321M1.8×0.351.451.5211.421M2.0×0.41.601.6791.567M2.2×0.451.751.8381.713M2.3×0.41.901.9791.867M2.5×0.452.102.1382.013M2.6×0.452.202.2382.113M3.0×0.52.502.5992.459M3.0×0.62.402.442.280M3.5×0.62.903.0102.850M4.0×0.73.303.4223.242M4.0×0.753.253.3263.106M4.5×0.753.803.8783.688M5.0×0.84.204.3344.134M5.0×0.94.104.1703.930M6.0×1.05.005.1534.917M7.0×1.06.006.1535.917M8.0×1.256.806.9126.647M9.0×1.257.807.9127.647M10×1.58.508.6768.376M11×1.59.509.6769.376M12×1.7510.3010.44110.106M14×2.012.0012.21011.735M16×2.014.0014.21013.835M18×2.515.5015.74415.294M20×2.517.5017.74417.294M22×2.519.5019.74419.294M24×3.021.0021.2522.752M27×3.024.0024.25223.752M30×3.526.5026.77126.211公 制 细 螺 纹规格标准径2级牙钻孔径最大最小M1.0×0.20.800.8210.783M1.1×0.20.900.9210.883M1.2×0.21.001.0210.983M1.4×0.21.201.2210.183M1.6×0.21.401.4211.383M1.7×0.21.451.5001.460M1.8×0.21.601.6211.583M2.0×0.251.751.7851.729M2.2×0.251.951.9851.929M2.3×0.252.052.0612.001M2.5×0.352.202.2212.121M2.6×0.352.202.2462.186M3.0×0.352.702.7212.621M3.5×0.353.203.2213.121M4.0×0.53.503.5993.459M4.5×0.54.004.0993.959M5×0.54.504.5994.459M5.5×0.55.005.0994.959M6.0×0.755.305.3785.188M6.0×0.55.505.5505.400M7.0×0.756.306.37861.88M7.0×0.56.506.55064.00M8.0×1.07.007.1536.917M8.0×0.757.307.3787.188M8×0.57.507.5207.400M9×1.08.008.1537.917M9×0.758.308.3788.188M10×1.258.808.9128.647M10×1.09.009.1538.917M10×0.759.309.3789.188M10×0.59.509.5209.400M11×1.010.0010.1539.917M11×0.7510.3010.37810.188M11×1.510.5010.67610.376M12×1.2510.8010.91210.647公 制 细 螺 纹规格标准径2级牙钻孔径最大最小M12×1.011.0011.15310.917M12×0.511.5011.52011.4M14×1.512.5012.67612.376M14×1.013.0013.15312.917M15×1.513.5013.67613.376M15×1.014.0014.15313.917M16×1.514.5014.67614.376M16×1.015.0015.15314.917M17×1.515.5015.67615.376M17×1.016.0016.15315.917M18×2.016.0016.21015.835M18×1.516.5016.67016.376M18×1.017.0017.15316.917M20×2.018.0018.21017.835M20×1.518.5018.67618.376M20×1.019.0019.15318.917M20×2.020.0020.21019.835M22×1.520.5020.67620.376M22×1.021.0021.15320.917M24×2.022.0022.21021.835M24×1.522.5022.67622.376M24×1.023.0023.15322.917M25×2.023.0023.21022.835M25×1.523.5023.67623.376M25×1.024.0024.15323.917M26×1.524.5024.67624.376M27×2.025.0025.21024.835M27×1.525.5025.67625.376M27×1.026.0026.15325.917M28×2.026.0026.21025.835M28×1.526.5026.67626.376M28×1.027.0027.15326.917M30×3.027.0027.25226.752M30×2.028.0028.21027.835M30×1.528.5028.67628.376M30×1.029.0029.15328.917M32×2.030.0030.21029.835M32×1.530.5030.67630.376M33×3.030.0030.25229.752M33×2.031.0031.21030.835M33×1.531.5031.37631.376M35×1.533.5033.67633.376M36×3.033.0033.25232.752M36×2.034.0034.21033.835M36×1.534.5034.67634.376美 制 细 螺 纹规格(UNF)标准径2级牙钻孔径最大最小番数牙外径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 -1617.5014.67817.3237/8 -1420.5020.67520.2701 -1223.2023.57123.1141-1/8 -1226.5026.74626.2891-1/4 -1229.5029.92129.4641-3/8 -1232.8033.09632.4641-1/2 -1236.0036.27035.814无 屑 丝 攻 钻 孔 径规格精度等级RH4.5.6RH7.8RH9M1.0×0.250.860.88-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-M2.6×0.452.351.38-M3.0×0.52.732.75-M3.0×0.63.173.20-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 管 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 -2813.2013.38613.1325/8 -2414.8014.98614.7323/4 -2017.8017.95817.6787/8 -2021.0021.13320.8531 -2024.0024.30824.028美 制 粗 螺 纹规格(UNC)标准径2级牙钻孔径番数牙外径最大最小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)2.802.8952.642NO.8-32(4.166)3.403.5303.302NO.10-24(4.826)3.903.9623.682NO.12-24(5.846)4.504.5974.3441/4 -205.105.2574.9795/16 -186.606.7316.4013/8 -168.008.1537.9877/16 -149.409.5009.1441/2 -1310.8011.02310.5929/16 -1212.2012.44611.9895/8 -1113.6012.86813.3863/4 -1016.2016.84016.3077/8 -919.5019.76119.1771 -822.2022.60621.9711-1/8 -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英制螺纹规格钻孔径硬材软材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 - 1210.7010.50W9/16 - 1212.3012.00W5/8 - 1113.7013.50W3/4 - 1016.7016.50W7/8 - 919.5019.30W1 - 822.4022.00W1-1/8 - 725.0024.80W1-1/4 - 728.3028.00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效牙部之长度(最小)中之母螺牙内径标准长度(最小)中之母螺牙内径使用绞刀时不用绞刀时PT1/16 -286.106.26.2446.384PT1/8 -288.108.28.2498.388PT1/4 -1910.701110.96211.174PT3/8 -1914.2014.514.44814.658PT1/2 -1417.601817.97918.263PT3/4 -1423.0023.523.37823.663Pt1 -1129.0029.529.45929.822PT1-1/4 -1137.503837.97638.339PT1-1/2 -1143.404443.86944.232Pt2 -1154.9055.555.41255.844美制螺纹滚造径规格钻孔径NPTNPS使用绞刀时不用绞刀时1/16 -276.16.256.351/8 -278.338.438.741/4 -1810.7211.1311.133/8 -1814.2714.2714.681/2 -1417.4817.8618.263/4 -1422.6323.0123.421 -11-1/228.5828.9829.361-1/4-11-1/237.3137.6938.11-1/2-11-1/243.6644.0444.452 -11-1/255.5855.9656.36英制螺纹滚造径规格滚造径W 3/16 - 244.08 - 4.05W 1/4 - 205.51 - 5.46W 5/16 - 187.01 - 6.95W 3/8 - 168.48 - 8.41W 7/16 - 149.92 - 9.85W 1/2 - 1211.31 - 11.24W 9/16 -1212.89 - 12.82公制螺纹规格滚造径M3.0×0.62.56 2.53M3.5×0.63.06 3.03M4.0×0.73.49 3.45M4.0×0.753.45 3.41M4.5×0.753.96 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 - 7.07M9.0×1.258.12 - 8.07M10×1.259.10 - 9.04M10×1.58.97 - 8.91M11×1.59.97 - 9.91M12×1.510.92 - 10.87M12×1.7510.79 - 10.73M14×2.012.63 - 12.56M16×2.014.63 - 14.56M18×2.516.31 - 16.23M20×2.518.31 - 18.23M22×2.520.31 - 20.23针车用螺纹规格(UNC)滚造径SM 1/8 402.735 -2.688SM 1/8 442.769 -2.722SM 9/64 403.128 -3.083SM 11/64 403.855 -3.805SM 3/16 324.205 -4.155SM 3/16 284.143 -4.093SM 7/32 325.003 -4.955SM 15/64 285.325 -4.955SM 1/4 405.890 -5.735SM 1/4 285.721 -5.366SM 9/32 286.528 -6.648SM 11/32 288.092 -8.432SM 3/8 298.880 -8.015SM 7/16 3010.466 -10.401SM 7/16 1610.037 -9.967SM 1/2 2011.819 -11.749SM 9/16 2013.400 -13.425美制粗螺纹规格(UNC)滚造径NO.5-402.70 - 2.67NO.6-322.95 - 2.91NO.8-323.60 - 3.57NO.10-244.09 - 4.05NO.12-244.75 - 4.701/4 -205.50 - 5.455/16 -186.98 - 6.933/8 -168.45 - 8.407/16 -149.89 - 9.831/2 -1311.39 - 11.329/16 -1212.87 - 12.80美制细螺纹规格(UNF)滚造径NO.5-442.73 - 2.70NO.6-403.05 - 3.02NO.8-363.66 - 3.63NO.10-324.26 - 4.80NO.12-284.84 - 4.801/4 -285.72 - 5.685/16 -247.20 - 7.163/8 -248.79 - 8.747/16 -2010.23 - 10.181/2 -2011.82 - 11.76