螺丝攻牙钻孔径和滚丝径对照表.docVIP

螺丝攻牙钻孔径和滚丝径对照表 公制挤压丝攻钻孔径美制挤压丝攻钻孔径规格精度等级规格（UNC）精度等级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－－M1.4×0.31.241.25－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－NO.10-244.244.3－M2.0×0.41.781.80－NO.12-244.904.96－M2.2×0.451.951.98－1/4-20－5.72－M2.3×0.42.082.10－5/16-18－7.24－M2.5×0.452.252.28－3/8-16－8.748.81M2.6×0.452.352.38－7/16-14－10.2010.30M3.0×0.52.732.75－1/2-13－11.2711.82M3.5×0.63.173.20－NO.2-64UNF1.97－－M4.0×0.73.623.653.69NO.3-562.27－－M5.0×0.84.564.604.64NO.4-482.56－－M6.0×1.05.455.505.55NO.5-442.86－－M7.0×1.06.456.506.55NO.6-403.16－－M8.0×1.257.317.387.44NO.8-363.78－－M10×1.59.189.259.32NO.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－????7/16-20－10.4810.54????1/2-20－12.0712.13 美制特细螺纹英制电器螺纹规格标准径2级牙钻孔径规格钻孔径最大最小NO.12-324.704.8264.6232BA4.0-4.21/4???? -325.605.6905.4863BA?5/16?? -327.107.2647.0874BA3.0-3.23/8??? -328.708.8658.6615BA2.7-2.87/16?? -2810.2010.33810.1356BA2.4-2.51/2???? -2811.8011.93811.709??9/16??? -2413.2013.38613.132??5/8??? -2414.8014.98614.732??3/4??? -2017.8017.95817.678??7/8??? -2021.0021.13320.853??1????? -2024.0024.30824.028? 螺丝攻牙钻孔径和滚丝径对照表 英制螺纹公制螺纹针车用螺纹规格(UNEF)钻孔径规格滚丝径规格滚丝径硬材软材W 1/8 - 402.652.60M3×0.52.63-2.60SM1/8-402.735-2.688W 5/32 - 323.253.20M3.0×0.62.56-2.53SM1/8-442.769-2.722W 3/16?- 243.753.70M3.5×0.63.06-3.03SM9/64-403.128-3.083W 1/4 - 205.105.00M4.0×0.73.49-3.45SM11/64-403.855-3.805W 5/16 - 186.606.50M4.0×0.753.45-3.41SM3/16-324.