公制细牙内螺纹公制粗牙内螺纹规格标准径 6H精度规格标准径 6H精度 Dmax Dmin Dmax Dmin M2.5*0.35 2.15 2.184 2.121 M1.4*0.3 1.10 1.16 1.075 M3.0*0.35 2.65 2.684 2.621 M1.6*0.35 1.25 1.321 1.221 M3.5*0.35 3.15 3.221 3.121 M1.8*0.35 1.45 1.521 1.421 M4.0*0.50 3.50 3.599 3.459 M2.0*0.4 1.60 1.679 1.567 M4.5*0.50 4.00 4.099 3.959 M2.2*0.45 1.75 1.838 1.713 M5.0*0.50 4.50 4.599 4.459 M2.5*0.45 2.05 2.138 2.013 M5.5*0.50 5.00 5.099 4.959 M3.0*0.5 2.50 2.599 2.459 M6.0*0.75 5.25 5.378 5.188 M3.5*0.6 2.90 3.01 2.85 M7.0*0.75 6.25 6.378 6.188 M4.0*0.7 3.30 3.422 3.242 M8*0.75 7.25 7.378 7.188 M4.5*0.75 3.75 3.878 3.688 M8*1.00 7.00 7.153 6.917 M5.0*0.8 4.20 4.334 4.134 M9*0.75 8.25 8.378 8.188 M5.5*0.5 5.00 5.099 4.959 M9*1.00 8.00 8.153 7.917 M6.0*1.00 5.00 5.153 4.917 M10*0.75 9.25 9.378 9.188 M7.0*1.00 6.00 6.153 5.917 M10*1.00 9.11 9.153 8.917 M8.0*1.25 6.75 6.912 6.647 M10*1.25 8.75 8.912 8.647 M9.0*1.25 7.75 7.912 7.647 M11*0.75 10.25 10.378 10.188 M10*1.50 8.50 8.676 8.376 M11*1.00 10.00 10.153 9.917 M11*1.50 9.50 9.676 9.376 M12*1.00 10.75 10.912 10.647 M12*1.75 10.25 10.44 10.106 M12*1.25 10.50 10.676 10.376 M14*2.00 12.00 12.21 11.835 M12*1.50 11.00 11.153 10.917 M15*1.50 13.50 13.676 13.375 M14*1.00 13.00 13.153 12.917 M16*2.00 14.00 14.21 13.835 M14*1.25 12.75 12.912 12.647 M17*1.50 15.50 15.676 15.376 M14*1.50 12.50 12.676 12.376 M18*2.50 15.50 15.744 15.294 M15*1.0 14.00 14.153 13.917 M20*2.50 17.50 17.744 17.294 M15*1.50 13.50 13.676 13.376 M22*2.50 19.50 19.744 19.294 M16*1.0 15.00 15.153 14.917 M24*3.00 21.00 21.252 20.752 M16*1.50 14.50 14.676 14.376 M27*3.00 24.00 24.252 23.752 M17*1.0 16.00 16.153 15.917 M30*3.50 26.50 26.771 26.211 M17*1.50 15.50 16.676 15.376 M18*1.0 17.00 17.153 16.917 M18*1.5 16.50 16.676 16.376 M18*2.0 16.00 16.21 15.835 M20*1.0 19.00 19.153 18.917 M20*1.50 18.50 18.676 18.376 M20*2.0 18.00 18.21 17.835 M22*1.0 21.00 21.153 20.917 M22*1.50 20.50 20.676 20.376 M22*2.0 20.00 20.21 19.835 M24*1.0 23.00 23.153 22.917 M24*1.50 22.50 22.676 22.376 M24*2.0 22.00 22.21 21.835 M25*1.0 24.00 24.153 23.917 M25*1.5 23.50 23.676 23.376 M25*2.0 23.00 23.21 22.835 M26*1.50 24.50 24.676 24.376 M27*1.0 26.00 26.153 25.917 M27*1.5 25.50 25.676 25.376 M28*1.0 27.00 27.153 26.917 M28*1.5 26.50 26.676 26.376 M28*2.0 26.00 26.21 25.835 M30*1.0 29.00 29.153 28.917 M30*1.50 28.50 28.676 28.376 M30*2.0 28.00 28.21 27.835 M30*3.0 27.00 27.252 26.752