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1、攻螺纹前钻孔用钻头直径钻头直径钻头直径钻头直径钻头直径螺纹代号脆 性 材 料韧 性 材 料螺纹代号脆 性 材 料韧 性 材 料螺纹代号脆 性 材 料韧 性 材 料螺纹代号脆 性 材 料韧 性 材 料CM3X0.52.52.5CM16X213.814.0CM30X3.526.226.5CM42X4.537.137.5M3X0.352.652.65M16X1.514.414.5M30X326.727M42X437.638M3.5X0.353.153.15M16X114.915.0M30X227.828M42X338.739CM4X0.73.33.3CM18X2.515.315.5M30X1.528
2、.328.5M42X239.840M4X0.53.53.5M18X215.815.9M30X128.929M42X1.540.340.5M4.5X0.54.04.0M18X1.516.416.5M32X229.830CM45X4.540.140.5CM5X0.84.124.2M18X116.917.0M32X1.530.330.5M45X440.641M5X0.54.54.5CM20X2.517.317.5CM33X3.529.229.5M45X341.742CM6X14.95.0M20X217.818.0M33X329.730M45X242.843M6X0.755.25.2M20X1.518
3、.418.5M33X230.831M45X1.543.343.5CM8X1.256.66.7M20X118.919M33X1.531.331.5CM48X542.543M8X16.97.0M22X2.519.319.5M35X1.533.333.5M48X443.644M8X0.757.17.2M22X219.820.0CM36X431.632M48X344.745CM10X1.58.48.5M22X1.520.420.5M36X332.733M48X245.846M10X1.258.68.7M22X120.921.0M36X233.834M48X1.546.346.5M10X18.99.0C
4、M24X320.821.0M36X1.534.334.5M50X346.747M10X0.759.29.3M24X221.822.0M38X1.536.336.5M50X247.848CM12X1.7510.110.2M24X1.522.422.5CM39X434.635M50X1.548.348.5M12X1.2510.610.7M24X122.023.0M39X335.736CM52X546.547M12X110.911.0M26X1.524.324.5M39X236.837M52X447.648CM14X211.812.0CM27X323.724M39X1.537.337.5M52X34
5、8.749M14X1.512.412.5M27X224.825M40X336.737M52X249.850M14X1.2512.712.8M27X1.525.325.5M40X237.838M52X1.55.350.5M14X112.913.0M27X125.926M40X1.528.338.5M55X450.651D（底孔）=M（螺纹）-1.0825P（螺距）M55X351.752M58X354.755M62X358.759M65X361.762M55X252.853M58X255.856M62X259.860M65X262.863M55X1.553.353.5M58X1.556.356.5
6、M62X1.560.360.5M65X1.563.363.5CM56X5.55050.5CM60X5.55454.5CM64X657.558CM68X661.562M56X451.652M60X455.656M64X459.660M68X463.664M56X352.753M60X356.757M64X360.761M68X364.765M56X253.854M60X257.858M64X261.862M68X265.866M56X1.554.354.5M60X1.558.358.5M64X1.562.362.5M68X1.566.366.5M58X453.654M62X457.658M65X460.661
