六角头螺栓和六角螺母用沉孔尺寸:摘自GB/T 152.4-1988
螺纹规格d |
d2 |
d3 |
d1 |
1.6 |
5 |
- |
1.8 |
2 |
6 |
- |
2.4 |
2.5 |
8 |
- |
2.9 |
3 |
9 |
- |
3.4 |
4 |
10 |
- |
4.5 |
5 |
11 |
- |
5.5 |
6 |
13 |
- |
6.6 |
8 |
18 |
- |
9 |
10 |
22 |
- |
11 |
12 |
26 |
16 |
13.5 |
14 |
30 |
18 |
15.5 |
16 |
33 |
20 |
17.5 |
18 |
36 |
22 |
20 |
20 |
40 |
24 |
22 |
22 |
43 |
26 |
24 |
24 |
48 |
28 |
26 |
27 |
53 |
33 |
30 |
30 |
61 |
36 |
33 |
33 |
66 |
39 |
36 |
36 |
71 |
42 |
39 |
39 |
76 |
45 |
42 |
42 |
82 |
48 |
45 |
45 |
89 |
51 |
48 |
48 |
98 |
56 |
52 |
52 |
107 |
60 |
56 |
55 |
112 |
68 |
62 |
60 |
118 |
72 |
66 |
64 |
125 |
76 |
70 |