材质 
M3
0.5
6.5
4
18.5
15.5
10.5
7.5
3
3
4
M4
0.7
6.5
4
18.5
15.5
10.5
7.5
3
3
4
M5
0.8
8
6
22.5
19.5
12.5
9.5
3.5
3.5
4.5
M6
1
10
7
28.5
25.5
14.5
11.5
4
4
5
M8
1.25
13
10
33
29
17.5
14.5
4.5
4.5
5.5
M10
1.5
16
12
38
34
19.5
16.5
5.5
5.5
6.5
M12
1.75
20
16
50
46
24.5
21.5
7
7
8
M14
2
20
16
50
46
24.5
21.5
7
7
8
M16
2
27
22
70
66
37
33
8
8
9
M18
2.5
27
22
70
66
37
33
8
8
9
M20
2.5
27
22
70
66
37
33
8
8
9