| 公称直径×螺距 |
螺纹精度等级 |
大径 |
中径 |
小径 |
螺胚直径 |
| 最大 |
最小 |
最大 |
最小 |
最大 |
最小 |
最大 |
| M3×0.5 |
6g |
2.980 |
2.874 |
2.655 |
2.580 |
2.439 |
2.60 |
2.63 |
| M4×0.7 |
3.978 |
3.838 |
3.523 |
3.433 |
3.220 |
3.47 |
3.50 |
| M5×0.8 |
4.976 |
4.826 |
4.456 |
4.361 |
4.110 |
4.40 |
4.43 |
| M6×1 |
5.974 |
5.794 |
5.324 |
5.212 |
4.891 |
5.26 |
5.29 |
| M8×1.25 |
7.972 |
7.760 |
7.160 |
7.042 |
6.619 |
7.10 |
7.14 |
| M10×1.5 |
9.968 |
9.732 |
8.994 |
8.862 |
8.344 |
8.92 |
8.96 |
| M12×1.75 |
11.966 |
11.701 |
10.829 |
10.679 |
10.072 |
10.75 |
10.79 |
| M14×2 |
13.962 |
13.682 |
12.663 |
12.503 |
11.797 |
12.57 |
12.62 |
| M16×2 |
15.962 |
15.682 |
14.663 |
14.503 |
13.797 |
14.57 |
14.62 |
| M18×2.5 |
17.958 |
17.623 |
16.334 |
16.164 |
15.252 |
16.24 |
16.29 |
| M20×2.5 |
19.958 |
19.623 |
18.334 |
18.164 |
17.252 |
18.24 |
18.29 |
| M22×2.5 |
21.958 |
21.623 |
20.334 |
20.164 |
19.252 |
20.24 |
20.29 |
| M24×3 |
23.952 |
23.577 |
22.003 |
21.803 |
20.704 |
21.89 |
21.95 |
| M27×3 |
26.952 |
26.577 |
25.003 |
24.803 |
23.704 |
24.89 |
24.95 |
| 1.螺胚直径指滚丝前的尺寸，数值为依经验公式计算而得，在实践中需验证。 |
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