螺纹代号对照表
公称直径D | 牙数/英寸N | 螺距T | 大径D | 小径D1 |
G1/8 | 28 | 0.907 | 9.728 | 8.566 |
G1/4 | 19 | 1.337 | 13.157 | 11.445 |
G3/8 | 19 | 1.337 | 16.662 | 14.95 |
G1/2 | 14 | 1.814 | 20.955 | 18.631 |
G3/4 | 14 | 1.814 | 26.441 | 24.117 |
G1 | 11 | 2.309 | 33.249 | 30.291 |
G1 1/4 | 11 | 2.309 | 41.91 | 38.952 |
G1 1/2 | 11 | 2.309 | 47.803 | 44.845 |
G2 | 11 | 2.309 | 59.614 | 56.656 |
标注代号 | 系列代号 | 公差等级 | 外螺纹 | 内螺纹 | ||||
大径 | 小径 | 公差等级 | 小径 | |||||
MAX | MIN | REF | MAX | MIN | ||||
3/8-16 | UNC | 2A | 9.491 | 9.254 | 7.543 | 2B | 8.153 | 7.798 |
3A | 9.525 | 9.287 | 7.576 | 3B | 8.082 | 7.798 | ||
7/16-20 | UNF | 2A | 11.079 | 10.874 | 9.522 | 2B | 10.033 | 9.729 |
3A | 11.112 | 10.907 | 9.555 | 3B | 9.946 | 9.729 | ||
1/2-13 | UNC | 2A | 12.661 | 12.386 | 10.264 | 2B | 11.023 | 10.592 |
3A | 12.7 | 12.424 | 10.302 | 3B | 10.881 | 10.592 | ||
9/16-18 | UNF | 2A | 14.251 | 14.031 | 12.519 | 2B | 13.081 | 12.751 |
3A | 14.287 | 4.067 | 12.555 | 3B | 12.969 | 12.751 | ||
11/16-16 | UN | 2A | 17.426 | 17.189 | 15.478 | 2B | 16.103 | 15.748 |
3A | 17.426 | 17.224 | 15.514 | 3B | 15.961 | 15.748 | ||
3/4-16 | UNF | 2A | 19.011 | 18.774 | 17.063 | 2B | 17.678 | 17.323 |
3A | 19.05 | 18.812 | 17.101 | 3B | 17.546 | 17.323 | ||
13/16-16 | UN | 2A | 20.599 | 20.361 | 18.651 | 2B | 19.278 | 18.923 |
3A | 20.637 | 20.399 | 18.689 | 3B | 19.133 | 18.923 | ||
1-14 | UNS | 2A | 25.356 | 25.096 | 23.131 | 2B | 23.825 | 23.445 |
3A | 25.4 | 25.139 | 23.174 | 3B | 23.66 | 23.445 | ||
1 1/16-12 | UN | 2A | 26.944 | 26.655 | 24.348 | 2B | 25.146 | 24.689 |
3A | 26.987 | 26.698 | 24.391 | 3B | 24.95 | 24.689 | ||
1 3/16-12 | UN | 2A | 30.119 | 29.83 | 27.523 | 2B | 28.321 | 27.864 |
3A | 30.162 | 29.873 | 27.566 | 3B | 28.125 | 27.864 | ||
1 5/16-12 | UN | 2A | 33.294 | 33.005 | 30.698 | 2B | 31.496 | 31.039 |
3A | 33.337 | 33.048 | 30.741 | 3B | 31.300 | 31.039 | ||
1 7/16-12 | UN | 2A | 36.466 | 36.178 | 33.87 | 2B | 34.671 | 34.514 |
3A | 36.512 | 36.223 | 33.916 | 3B | 34.475 | 34.214 | ||
1 5/8-12 | UN | 2A | 41.229 | 40.94 | 38.633 | 2B | 39.446 | 38.989 |
3A | 41.275 | 40.986 | 38.679 | 3B | 39.237 | 38.989 | ||
1 11/16-12 | UN | 2A | 42.816 | 42.528 | 40.22 | 2B | 41.021 | 40.564 |
3A | 42.862 | 42.573 | 40.266 | 3B | 40.825 | 40.564 | ||
2 1/2-12 | UN | 2A | 63.451 | 63.163 | 60.855 | 2B | 61.671 | 61.214 |
3A | 63.5 | 63.211 | 60.904 | 3B | 61.462 | 61.214 |
GB/T12716-1991常用60度圆锥管螺纹尺寸NPT
锥管螺纹的基本尺寸 | 小端螺纹尺寸 | |||||
尺寸代号 | 大径D | 小径D1 | 基准距离L1 | 有效长度L2 | 大径D | 小径D1 |
1/8-27 | 10.242 | 8.736 | 4.102 | 6.703 | 9.986 | 8.48 |
1/4-18 | 13.616 | 11.358 | 5.786 | 10.206 | 13.255 | 10.997 |
3/8-18 | 17.055 | 14.797 | 6.096 | 10.358 | 16.674 | 14.416 |
1/2-14 | 21.223 | 18.321 | 8.128 | 13.556 | 20.715 | 17.813 |
3/4-14 | 26.568 | 23.666 | 8.611 | 13.861 | 26.03 | 23.128 |
1-11.5. | 33.228 | 29.694 | 10.16 | 17.343 | 32.593 | 29.059 |
1 1/4-11.5 | 41.985 | 38.451 | 10.668 | 17.953 | 41.318 | 37.784 |
1 1/2-11.5 | 48.054 | 44.52 | 10.668 | 18.377 | 47.388 | 43.854 |
2-11.5 | 60.092 | 56.558 | 11.074 | 19.215 | 59.4 | 55.866 |
2 1/2-11.5 | 72.699 | 67.619 | 17.323 | 28.892 | 71.616 | 66.536 |