1、上限 下限 上限 下限 上限 下限M1*0.25 0.75 0.785 0.729 M1*0.2 0.8 0.821 0.783 M22*1.5 20.5 20.676 20.376M1.1*0.25 0.85 0.885 0.829 M1.1*0.2 0.9 0.921 0.883 M22*1 21 21.153 20.917M1.2*0.25 0.95 0.985 0.929 M1.2*0.2 1 1.021 0.983 M24*2 22 22.21 21.835M1.4*0.3 1.1 1.142 1.075 M1.4*0.2 1.2 1.221 1.183 M24*1.5 22.5 2
2、2.676 22.376M1.6*0.35 1.25 1.321 1.221 M1.6*0.2 1.4 1.421 1.383 M24*1 23 23.153 22.917M1.7*0.35 1.35 1.421 1.321 M1.8*0.2 1.6 1.621 1.583 M25*2 23 23.21 22.835M1.8*0.45 1.45 1.521 1.421 M2*0.25 1.75 1.785 1.729 M25*1.5 23.5 23.676 23.376M2*0.4 1.6 1.679 1.567 M2.5*0.35 2.2 2.221 2.121 M25*1 24 24.15
3、3 23.917M2.2*0.4 1.75 1.838 1.712 M3*0.5 2.7 2.721 2.621 M26*1.5 24.5 24.676 24.316M2.3*0.4 1.9 1.979 1.867 M3.5*0.35 2.2 3.221 3.121 M27*2 25 25.21 24.835M2.5*0.45 2.1 2.138 2.013 M4*0.5 3.5 3.599 3.459 M27*1.5 25.5 25.676 25.376M2.6*0.45 2.2 2.238 2.113 M4.5*0.5 4 4.099 3.959 M27*1 26 26.153 25.91
4、7M3*0.5 2.5 2.599 2.459 M5*0.5 4.5 4.599 4.459 M28*2 26 26.21 25.835M3*0.6 2.4 2.44 2.228 M5.5*0.5 5 5.099 4.959 M28*1.5 26.5 26.676 26.376M3.5*0.6 2.9 3.01 2.85 M6*0.75 5.3 5.378 5.188 M28*1 27 27.153 26.917M4*0.7 3.3 3.422 3.242 M7*0.75 6.3 6.378 6.188 M30*3 27 27.252 26.752M4*0.75 3.25 3.326 3.10
5、6 M8*1 7 7.153 6.917 M30*2 28 28.21 27.835M4.5*0.75 3.28 3.878 3.668 M8*0.75 7.3 7.378 7.188 M30*1.5 28.5 28.676 28.376M5*0.8 4.2 4.334 4.134 M9*1 8 8.153 7.917 M30*1 29 29.153 28.917M5*0.9 4.1 4.17 3.93 M9*0.75 8.3 8.378 8.188 M32*2 30 30.21 29.835M6*1 5 5.153 4.917 M10*1.25 8.8 8.912 8.647 M32*1.5
6、 30.5 30.676 30.376M7*1 6 6.153 5.917 M10*1 9 9.153 8.917 M33*3 30 30.252 29.752M8*1.25 6.8 6.912 6.647 M10*0.75 9.3 9.378 9.188 M33*2 31 31.21 30.835M9*1.25 7.8 7.912 7.647 M10*0.5 9.5 9.52 9.4 M33*1.5 31.5 31.676 31.376M10*1.5 8.5 8.676 8.376 M11*1 10 10.153 9.917 M35*1.5 33.5 33.676 33.376M11*1.5
7、 9.5 9.676 9.376 M11*0.75 10.3 10.378 10.188 M36*3 33 33.252 32.752M12*1.75 10.3 10.441 10.106 M12*1.5 10.5 10.676 10.376 M36*2 34 34.21 33.835M14*2 12 12.21 11.836 M12*1.25 10.8 10.912 10.647 M36*1.5 34.5 34.676 34.376M16*2 14 14.21 13.835 M12*1 11 11.153 10.917 M38*1.5 36.5 36.676 36.376M18*2.5 15
8、.5 15.744 15.294 M14*1.5 12.5 12.676 12.376 M39*3 36 36.252 35.752M20*2.5 17.5 17.744 17.294 M14*1 13 13.153 12.917 M39*2 37 37.21 36.835M22*2.5 19.5 19.744 19.294 M15*1.5 13.5 13.676 13.376 M39*1.5 37.5 37.676 37.376M24*3 21 21.252 20.752 M15*1 14 14.153 13.917 M40*3 37 37.252 36.752M27*3 24 24.252
9、 23.752 M16*1.5 14.5 14.676 14.376M30*3.5 26.5 26.771 26.211 M16*1 15 15.153 14.917M33*3.5 29.5 29.771 29.211 M17*1.5 15.5 15.676 15.376M36*4 32 32.27 31.67 M17*1 16 16.153 15.917M39*4 35 35.27 34.67 M18*2 16 16.21 15.835M42*4.5 37.5 37.799 37.129 M18*0.25 16.5 16.675 16.376M45*4.5 40.5 40.799 40.129 M18*1 17 17.153 16.917M48*5 43 43.297 42.587 M20*2 18 18.21 17.835M20*1.5 18.5 18.676 18.375M20*1 19 19.153 18.917M22*2 20 20.21 19.835称呼尺寸 下孔径公制内螺纹小径极限公差表（螺纹底径）公制粗牙螺纹 公制细牙螺纹 公制细牙螺纹称呼尺寸 下孔径 6H级螺纹内径6H级螺纹内径 称呼尺寸 下孔径 6H级螺纹内径
