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螺丝攻牙钻孔径和滚造径对照表--粗螺纹

  

螺丝粗螺纹攻牙钻孔径和滚造径对照表
公制粗螺纹 美制粗螺纹
规格 标准径 2级牙钻孔径 规格(UNC) 标准径 2级牙钻孔径
最大 最小 最大 最小
M1.0×0.25 0.75 0.785 0.729 NO.1-64(1.854) 1.55 1.582 1.425
M1.1×0.25 0.85 0.885 0.829 NO.2-56(2.184) 1.80 1.871 1.695
M1.2×0.25 0.95 0.985 0.985 NO.3-48(2.515) 2.10 2.146 1.941
M1.4×0.3 1.10 1.142 1.075 NO.4-40(2.845) 2.30 2.385 2.157
M1.6×0.35 1.25 1.321 1.221 NO.5-40(3.175) 2.60 2.697 2.487
M1.7×0.35 1.35 1.421 1.321 NO.6-32(3.505) 2.80 2.895 2.642
M1.8×0.35 1.45 1.521 1.421 NO8-32(4.166) 3.40 3.53 3.302
M2.0×0.4 1.60 1.679 1.567 NO.10-24(4.826) 3.90 3.962 3.683
M2.2×0.45 1.75 1.838 1.713 NO.12-24(5.486) 4.50 4.597 4.344
M2.3×0.4 1.90 1.979 1.867 1/4-20 5.10 5.257 4.979
M2.5×0.45 2.10 2.138 2.013 5/16-18 6.60 6.731 6.401
M2.6×0.45 2.20 2.238 2.113 3/8-16 8.00 8.153 7.798
M3.0×0.5 2.50 2.599 2.459 7/16-14 9.40 9.55 9.144
M3.0×0.6 2.40 2.440 2.280 1/2-13 10.80 11.023 10.592
M3.5×0.6 2.90 3.010 2.850 9/16-12 12.20 12.446 11.989
M4.0×0.7 3.30 3.422 3.242 5/8-11 13.60 12.868 13.386
M4.0×0.75 3.25 3.326 3.106 3/4-10 16.50 18.840 16.307
M4.5×0.75 3.80 3.878 3.688 7/8-9 19.50 19.761 19.177
M5.0×0.8 4.20 4.334 4.134 1 22.20 22.606 21.971
M5.0×0.9 4.10 4.170 3.930 1-1/8-7 25.00 25.349 24.638
M6.0×1.0 5.00 5.153 4.917 1-1/4-7 28.20 28.524 27.813
M7.0×1.0 6.00 6.153 5.917 1-3/8-6 30.80 31.115 30.353
M8.0×1.25 6.80 6.912 6.647 1-1/2-6 34.00 34.290 33.528
M9.0×1.25 7.80 7.912 7.647 1-3/4-5 39.50 39.827 38.964
M10×1.5 8.50 8.676 8.376 2-4-1/2 45.20 45.593 44.679
M11×1.5 9.50 9.676 9.376        
M12×1.75 10.30 10.441 10.106        
M14×2.0 12.00 12.210 11.835        
M16×2.0 14.00 14.210 13.835        
M18×2.5 15.50 15.744 15.294        
M20×2.5 17.50 17.744 17.294        
M22×2.5 19.50 19.744 19.294        
M24×3.0 21.00 21.252 20.752        
M27×3.0 24.00 24.252 23.752        
M30×3.5 26.50 26.771 26.211        

 

 

 
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