材质 
M5
0.8
5.7
11.8
5
4.82
8.56
5.4
0.25
8
7.64
M6
1
6.8
14.2
6
5.82
10.8
6.6
0.4
10
9.64
M8
1.25
9.2
18
8
7.78
14.08
8.1
0.4
13
12.57
M10
1.5
11.2
22.3
10
9.78
16.32
9.2
0.4
15
14.57
M12
1.75
13.7
26.6
12
11.73
19.68
10.4
0.6
18
17.57
M14
2
15.7
30.5
14
13.73
22.58
12.4
0.6
21
20.16
M16
2
17.7
35
16
15.73
25.94
14.1
0.6
24
23.16
M20
2.5
22.4
43
20
19.67
32.66
17.7
0.8
30
29.16