螺紋

1/16 1/8 1/4 3/8 1/2 3/4 1 1-1/4 1-1/2 2 2-1/2 3

牙數 螺距 / mm 牙型高度 / mm 大徑 d = D / mm 中徑 d2 = D2 / mm 小徑 d1 = D1 / mm 基準距離 螺紋數量 基準距離 L1 / mm 裝配余量距離 螺紋數量 裝配距離 L3 / mm 外螺紋小端面內的基本小徑 / mm

27 27 18 18 14 14 11.5 11.5 11.5 11.5 8 8 0.941 0.941 1.411 1.411 1.814 1.814 2.209 2.209 2.209 2.209 3.175 3.175 0.752 0.752 1.129 1.129 1.451 1.451 1.767 1.767 1.767 1.767 2.540 2.540 7.894 10.242 13.616 17.055 21.224 26.569 33.228 41.985 48.054 60.092 72.699 88.608 7.120 9.489 12.487 15.926 19.772 25.117 31.461 40.218 46.287 58.325 70.159 86.068 6.389 8.737 11.358 14.797 18.321 23.666 29.694 38.451 44.520 56.558 67.619 83.528 4.32 4.36 4.10 4.32 4.48 4.75 0.60 4.83 4.83 5.01 5.46 6.13 4.064 4.102 5.785 6.096 8.128 8.618 10.160 10.668 10.668 11.065 17.335 19.463 3 3 3 3 3 3 3 3 3 3 2 2 2.822 2.822 4.233 4.233 5.443 5.443 6.626 6.626 6.626 6.626 6.350 6.350 6.137 8.481 10.996 14.417 17.813 23.127 29.060 37.785 43.853 55.867 66.535 82.311

螺紋

3-1/2 4 5 6 8 10 12 14 O.D. ① 16 O.D. ① 18 O.D. ① 20 O.D. ① 24 O.D. ①

牙數 螺距 / mm 牙型高度 / mm 大徑 d = D / mm 中徑 d2 = D2 / mm 小徑 d1 = D1 / mm 基準距離 螺紋數量 基準距離 L1 / mm 裝配余量距離 螺紋數量 裝配距離 L3 / mm 外螺紋小端面內的基本小徑 / mm

8 8 8 8 8 8 8 8 8 8 8 8 3.175 3.175 3.175 3.175 3.175 3.175 3.175 3.175 3.175 3.175 3.175 3.175 2.540 2.540 2.540 2.540 2.540 2.540 2.540 2.540 2.540 2.540 2.540 2.540 101.316 113.973 140.952 167.792 218.441 272.312 323.032 354.904 405.784 456.565 507.246 608.608 98.776 111.433 138.412 165.252 215.901 269.772 320.492 352.364 403.244 454.025 504.706 606.068 96.236 108.893 135.872 162.712 213.361 267.232 317.952 349.824 400.704 451.485 502.166 603.528 6.57 6.75 7.50 7.66 8.50 9.68 10.88 12.50 14.50 16.00 17.00 19.00 20.860 21.431 23.812 24.320 26.988 30.734 35.544 39.688 46.038 50.800 53.975 60.325 2 2 2 2 2 2 2 2 2 2 2 2 6.350 6.350 6.350 6.350 6.350 6.350 6.350 6.350 6.350 6.350 6.350 6.350 94.932 107.554 134.384 161.191 211.673 265.311 315.793 347.345 397.828 448.310 498.792 599.758

①, O.D. 是英文管子外徑（outside diameter）的縮寫 ②, 數據來源：GB 12716-2002, ASME B1.20.1