公制螺纹标准

普通螺纹基本尺寸（mm） 公称直径 1 1.2 1.4 1.6 2 2.5 3 3.5 4 4.5 5 6 8 8 10 10 10 12 12 12 14 14 16 16 18 20 20 20 螺距p 0.25 0.25 0.3 0.35 0.4 0.45 0.5 0.6 0.7 0.75 0.8 1 1 1.25 1 1.25 1.5 1.25 1.5 1.75 1.5 2 1.5 2 2.5 1.5 2 2.5 中径 0.838 1.038 1.205 1.373 1.740 2.208 2.675 3.110 3.545 4.013 4.480 5.350 7.350 7.188 9.350 9.188 9.026 11.188 11.026 10.863 13.026 12.701 15.026 14.701 16.376 19.026 18.701 18.376 小径 0.729 0.929 1.075 1.221 1.567 2.013 2.459 2.850 3.242 3.688 4.134 4.917 6.917 6.647 8.917 8.647 8.376 10.647 10.376 10.106 12.376 11.835 14.376 13.835 15.294 18.376 17.835 17.294 普通螺纹基本尺寸（mm） 公称直径 22 22 24 24 27 27 30 30 33 33 36 36 39 39 42 42 45 45 48 48 52 52 58 58 60 60 64 64 螺距p 1.5 2.5 2 3 2 3 2 3.5 2 3.5 3 4 3 4 3 4.5 3 4.5 3 5 4 5 4 4.5 4 5.5 4 6 中径 21.026 20.376 22.701 22.051 25.701 25.051 28.701 27.727 31.701 30.727 34.051 33.042 37.051 36.042 40.051 39.077 43.051 42.077 46.051 44.752 49.402 48.752 53.402 52.428 57.402 56.428 61.402 60.103 小径 20.376 19.294 21.835 20.752 24.835 23.752 27.835 26.211 30.835 29.211 32.752 31.670 35.752 34.670 38.752 37.129 41.752 40.129 44.752 42.587 47.670 46.587 51.670 50.046 55.670 54.046 59.670 57.505