普通螺纹(毫米) 普通螺纹(毫米)粗牙螺纹 螺距(t) 内径(d1) 外径(d) 2 0.4 1.567 2.5 0.45 2.013 3 0.5 2.459 4 0.7 3.242 5 0.8 4.134 6 1 4.918 8 1.25 6.647 10 1.5 8.376 12 1.75 10.106 14 2 11.835 16 2 13.835 18 2.5 15.294 20 2.5 17.294 22 2.5 19.294 24 3 20.752 27 3 23.752 30 3.5 26.211 螺距(t) 细牙螺纹 内径(d1)

0.5 0.5 0.75 1,0.75,0.5 1.25,1,0.75 1.5,1.25,1 1.5,1 1.5,1 2,1.5,1 2,1.5,1 2,1.5,1 2,1.5,1 2,1.5,1 2,1.5,1

3.459 4.459 5.188 6.918,7.188,7.459 8.647,8.918,9.188 10.376,10.647,10.918 12.376,12.918 14.376,14.918 15.835,16.376,16.918 17.835,18.376,18.918 19.835,20.376,20.918 21.835,22.376,22.918 24.835,25.376,25.918 27.835,28.376,28.918