管螺纹基本尺寸表
管螺纹基本尺寸表 (GB/T7307-1987)
公称直径 (英寸) (1/8) 1/4 3/8 1/2 (5/8) 3/4 (7/8)
1 1.1/8 1.1/4 1.3/8 1.1/2 1.3/4 2 2.1/4 2.1/2 2.3/4 3 3.1/2 4 5 6
每英寸 牙数n 28 19 19 14 14 14 14 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 2.309 1.814 螺纹直径 螺距t 外径d 0.907 1.337 9.729 13.158 16.663 20.956 00.912 26.442 30.202 33.250 37.898 41.912 44.325 47.805 53.748 59.616 65.712 75.187 81.537 87.887 100.334 113.034 138.435 163.836 中径d2 9.148 12.302 15.807 19.794 21.750 25.281 29.040 31.771 36.420 40.433 42.846 46.326 52.270 58.137 64.234 73.708 80.058 86.409 98.855 111.556 136.957 162.357 内径d1 8.567 11.446 14.951 18.632 20.588 24.119 27.878 30.293 34.941 38.954 41.367 44.847 50.791 56.659 62.755 72.230 78.580 84.980 97.376 110.077 135.478 160.879 1.479 0.317 1.162 0.249 牙形高度 h1 0.581 0.856 0.856 圆弧半径 r 0.125 0.184 0.184