材质 
M4
0.7
5.5
5
3
2.8
8.1
2.8
1
0.2
7
1.4
M5
0.8
6.5
6
3.9
3.7
9.2
3.5
1.2
0.2
8
1.7
M6
1
8.8
8
4.6
4.4
11.5
4
1.6
0.3
10
2
M8
1.25
11.8
11
6.2
6
15
5.5
2
0.5
13
2.5
M10
1.5
15
14
7.7
7.5
19.6
7
2.5
0.5
16
3
M12
1.75
17
16
9.2
9
21.9
8
3
1
18
3.5
M16
2
21.5
20
12.7
12.5
27.7
10
4
1
24
4