材质 
M5
0.8
5.7
11.4
5
4.82
7.44
5.6
1.4
0.2
7
6.64
M6
1
6.8
13.6
6
5.82
8.56
6.8
1.6
0.25
8
7.64
M8
1.25
9.2
17
8
7.78
10.8
8.5
2.1
0.4
10
9.64
M10
1.5
11.2
20.8
10
9.78
14.08
9.7
2.1
0.4
13
12.57
M12
1.75
13.7
24.7
12
11.73
16.32
11.9
2.1
0.6
15
14.57
M14
2
15.7
28.6
14
13.73
19.68
12.9
2.1
0.6
18
17.57
M16
2
17.7
32.8
16
15.73
22.58
15.1
3.2
0.6
21
20.16