GB螺纹攻丝底孔尺寸.doc

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1、普通螺纹攻丝前底孔尺寸直径螺距钻孔直径车孔直径直径×螺距钻孔直径车孔直径铸铁/青铜钢/黄铜直径公差铸铁/青铜钢/黄铜直径公差M4×0.7M4×0.53.33.53.33.5M27××3M27×223.724.723.924.923.5+0.3M5×0.8M5×0.54.14.44.24.5M27×1.5M27×125.325.825.526M6×1M6×0.754.95.155.24.9-+0.3M30×3.5M30×32626.726.226.926+0.3M8×1.25M8×16.66.96.776.6-+0.2M30×2M30×1.527.72

2、8.327.928.5M10×1.5M10×1.25M10×18.48.68.98.58.798.3--+0.25M33×3.5M33×3M33×22929.730.729.229.930.929+0.3M12×1.75M12×1.5M12×1.25M12×110.110.410.610.910.210.510.71110+0.25M33×1.5M36×4M36×3M36×1.531.331.532.734.331.531.732.934.5-31.432.534.3-+0.3+0.17+0.17M14×2M14×1.5M14×111.812.412

3、.911.912.51311.7+0.3M39×4M39×3M39×1.534.635.737.334.835.937.534.435.537.3+0.3+0.17+0.17M16×2M16×1.5M16×113.814.414.913.914.51513.7+0.3M42×4.5M42×3M42×1.537.138.740.337.338.940.536.838.540.3+0.3+0.17+0.17M18×2.5M18×2M18×1.5M18×115.315.816.416.915.415.916.51715.1+0.3M45×4.5M45×3M

4、45×1.54041.843.340.24243.539.841.543.3+0.3+0.17+0.17M20×2.5M20×2M20×1.5M20×117.217.718.318.817.417.918.51917.1+0.3M48×5M48×3M48×1.542.544.846.342.74546.542.244.546.3+0.3+0.17+0.17M22×2.5M22×2M22×1.5M22×119.219.720.320.819.419.920.52119.1+0.3M52×5M52×3M52×1.546.448.850.346.64950

5、.546.248.550.2+0.3+0.17+0.17M24×3M24×2M24×120.721.722.820.921.92320.5+0.3M56×5.5M56×4M56×2------49.751.453.7+0.3+0.2+0.2