材质 
M3
0.5
5
4
17.5
14.5
10
7
2.4
2.5
3
M4
0.7
7
6
22.5
19.5
12.5
9.5
3.2
3
4
M5
0.8
8.5
7
22.5
19.5
12.5
9.5
4
3.5
4.5
M6
1
10.5
9
24.5
21.5
15.5
12.5
5
4
5
M8
1.25
13
10
31.5
28.5
17.5
14.5
6.5
4.5
5.5
M10
1.5
16
12
39
35
20.5
17.5
8
5.5
6.5