公制内螺纹细牙.doc

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1、公制内螺纹（细牙）公称直径×螺距大径中径小径攻丝前钻头直径最小最大最小最大最小M3×0.353.0002.8632.7732.7212.6212.65M4×0.54.0003.7753.6753.5593.4593.50M5×0.55.0004.7754.6754.5994.4594.50M6×0.756.0005.6455.5135.3785.1885.20M8×0.758.0007.6457.5137.3787.1887.20M8×18.0007.5007.3507.1536.9177.00M10×0.7510.0009.6459.5139.3789.1889.20M10×110.0

2、008.5009.3509.1538.9179.00M10×1.2510.0009.3489.1888.9128.6478.80M12×112.00011.51011.35011.15310.91711.00M12×1.2512.00011.36811.18810.91210.64710.80M12×1.512.00011.21611.02610.67610.37610.50M14×114.00013.51013.35013.15312.91713.00M14×1.514.00013.21613.02612.67612.37612.50M16×116.00015.51015.35015.

3、15314.91715.00M16×1.516.00015.21615.02614.67614.37614.50M18×118.00017.51017.35017.15316.91717.00M18×1.518.00017.21617.02616.67616.37616.50M18×218.00016.91316.70116.21015.83516.00公制内螺纹（细牙）公称直径×螺距大径中径小径攻丝前钻头直径最小最大最小最大最小M20×120.00019.51019.35019.15318.91719.00M20×1.520.00019.21619.02618.67618.37618.

4、50M20×220.00018.91318.70118.21017.83518.00M22×122.00021.51021.35021.15320.91721.00M22×1.522.00021.21621.02620.67620.37620.50M22×222.00020.91320.70120.21019.83520.00M24×124.00025.52023.35023.15322.91723.00M24×1.524.00023.22623.02622.67622.37622.50M24×224.00022.92522.70122.21021.83522.00M27×127.000

5、26.52026.35026.15325.91726.00M27×1.527.00026.22626.02625.67625.37625.50M27×227.00025.92525.70125.21024.83525.00