材质 
M5
0.8
5.7
11.4
5
4.82
7.59
5.6
1.4
0.2
7
6.78
M6
1
6.8
13.6
6
5.82
8.71
6.9
1.6
0.25
8
7.78
M8
1.25
9.2
17
8
7.78
10.95
8.5
2.1
0.4
10
9.78
M10
1.5
11.2
20.8
10
9.78
14.26
9.7
2.1
0.4
13
12.73
M12
1.75
13.7
24.7
12
11.73
16.5
12.1
2.1
0.6
15
14.73
M14
2
15.7
28.6
14
13.73
19.86
12.9
2.1
0.6
18
17.73
M16
2
17.7
32.8
16
15.73
23.15
15.2
3.2
0.6
21
20.67