材质 
M3
0.5
5.5
5.38
6.4
6.08
3.6
1.8
M4
0.7
7
6.85
8.1
7.74
4.8
2.6
M5
0.8
8
7.85
9.2
8.87
6
3
M6
1
10
9.78
11.5
11.05
6.6
3.9
M8
1.25
13
12.73
15
14.38
8.8
4.2
M10
1.5
17
16.73
19.6
18.9
11
6.2
M12
1.75
19
18.67
21.9
21.1
13.2
7.1
M14
2
22
21.67
25.4
24.49
15.4
7.6
M16
2
24
23.67
27.7
26.75
17.6
10.1
M20
2.5
30
29.67
34.6
33.53
22
11
M22
2.5
32
31.61
36.9
35.72
24.2
11.5
M24
3
36
35.38
41.6
39.98
26.4
12.3
M27
3
41
40.38
47.3
45.63
27
14
M30
3.5
46
45.38
53.1
51.28
30
15.7
M33
3.5
50
49.38
57.7
55.8
33
17.3
M36
4
55
54.26
63.5
61.31
36
18.5