材质 
M5
0.8
8.79
5.3
4.8
8
7.78
M6
1
11.05
5.9
5.4
10
9.78
M8
1.25
14.38
7.1
6.44
13
12.73
M10
1.5
17.77
9
8.04
16
15.73
M12
1.75
20.03
11.6
10.37
18
17.73
M14
2
23.36
13.2
12.1
21
20.67
M16
2
26.75
15.2
14.1
24
23.67
M18
2.5
29.56
17
15.01
27
26.16
M20
2.5
32.95
19
16.9
30
29.16
M22
2.5
37.29
21
18.1
34
33
M24
3
39.55
23
20.2
36
35
M30
3.5
50.85
26.9
24.3
46
45
M36
4
60.79
32.5
29.4
55
53.8