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60°密封管螺纹的基本尺寸(摘自GB/T 12716-2002)

注:1.可参照表中第12栏数据选择攻丝前的麻花钻直径。
2.螺纹收尾长度(V)为3.47P。
3.O.D.是英文管子外径(outside diameter)的缩写。

螺纹的尺寸代号 25.4mm内所包含的牙数n 螺距P 牙高h 基准平面内的基本直径 基准距离L1 装配余量L3 外螺纹小端面内的基本小径
大径d=D 中径d2=D2 小径d1=D1
mm 圈数 mm 圈数 mm mm
1/16 27 0.941 0.752 7.894 7.142 6.389 4.32 4.064 3 2.822 6.137
1/8 27 0.941 0.752 10.242 9.489 8.737 4.36 4.102 3 2.822 8.481
1/4 18 1.411 1.129 13.616 12.487 11.358 4.1 5.785 3 4.233 10.996
3/8 18 1.411 1.129 17.055 15.926 14.797 4.32 6.096 3 4.233 14.417
1/2 14 1.814 1.451 21.224 19.772 18.321 4.48 8.128 3 5.443 17.813
3/4 14 1.814 1.451 26.569 25.117 23.666 4.75 8.618 3 5.443 23.127
1 11.5 2.209 1.767 33.228 31.461 29.694 4.6 10.16 3 6.626 29.06
1 1/4 11.5 2.209 1.767 41.985 40.218 38.451 4.83 10.668 3 6.626 37.785
1 1/2 11.5 2.209 1.767 48.054 46.287 44.52 4.83 10.668 3 6.6226 43.853
2 11.5 2.209 1.767 60.092 58.325 56.558 5.01 11.065 3 6.626 55.867
2 1/2 8 3.175 2.54 72.699 70.159 67.619 5.46 17.335 2 6.35 66.535
3 8 3.175 2.54 88.608 86.068 83.528 6.13 19.463 2 6.35 82.311
3 1/2 8 3.175 2.54 101.316 98.776 96.236 6.57 20.86 2 6.35 94.932
4 8 3.175 2.54 113.973 111.433 108.893 6.75 21.431 2 6.35 107.554
5 8 3.175 2.54 140.952 138.412 135.872 7.5 23.812 2 6.35 134.384
6 8 3.175 2.54 167.792 165.252 162.712 7.66 24.32 2 6.35 161.191
8 8 3.175 2.54 218.441 215.901 213.361 8.5 26.988 2 6.35 211.673
10 8 3.175 2.54 272.312 269.772 267.232 9.68 30.734 2 6.35 265.311
12 8 3.175 2.54 323.032 320.492 317.952 10.88 34.544 2 6.35 315.793
14 O.D. 8 3.175 2.54 354.904 352.364 349.824 12.5 39.688 2 6.35 347.345
16 O.D. 8 3.175 2.54 405.784 403.244 400.704 14.5 46.038 2 6.35 397.828
18 O.D. 8 3.175 2.54 456.565 454.025 451.485 16 50.8 2 6.35 448.31
20 O.D. 8 3.175 2.54 507.246 504.706 502.166 17 53.975 2 6.35 498.792
24 O.D. 8 3.175 2.54 608.608 606.068 603.528 19 60.325 2 6.35 599.758