螺纹牙套钻孔尺寸表-通制作公制粗螺纹 底孔尺寸范围 钻头选择 公制粗螺纹 底孔尺寸范围 钻头选择M3*0.5 3.12-3.20 3.1 M8*1.0 8.25-8.42 8.3M4*0.7 4.17-4.30 4.2 M10*1.0 10.25-10.42 10.3M5*0.8 5.16-5.33 5.2 M10*1.25 10.31-10.52 10.4M6*1.0 6.25-6.42 6.3 M12*1.25 12.31-12.52 12.4M7*1.0 7.25-7.42 7.3 M12*1.5 12.37-12.62 12.5M8*1.25 8.31-8.52 8.4 M14*1.25 14.27-14.4 14.3M10*1.5 10.37-10.62 10.5 M14*1.5 14.37-14.62 14.5M12*1.75 12.43-12.73 12.5 M16*1.5 16.37-16.62 16.5M14*2.0 14.49-14.83 14.5 M18*1.5 18.37-18.62 18.5M16*2.0 16.49-16.83 16.5 M20*1.5 20.37-20.62 20.5M18*2.5 18.58-19.04 19M20*2.5 20.58-21.04 21
