材质 
M5
0.8
6.2
11.8
5
4.82
8.56
1.4
5.4
0.1
8
7.64
M6
1
7.4
14.2
6
5.82
10.8
2
6.6
0.1
10
9.64
M8
1.25
10
18
8
7.78
14.08
2
8.1
0.15
13
12.57
M10
1.5
12.6
22.3
10
9.78
16.32
2
9.2
0.2
15
14.57
M12
1.75
15.2
26.6
12
11.73
19.68
3
10.4
0.25
18
17.57
M14
2
17.7
30.5
14
13.73
22.58
3
12.4
0.3
21
20.16
M16
2
20.7
35
16
15.73
25.94
3
14.1
0.35
24
23.16
M20
2.5
25.7
43
20
19.67
32.66
4
17.7
0.4
30
29.16