材质 
M6
1
7.2
6.6
5.85
4.6
3.4
0.25
10
9.4
M8
1.25
10.2
8.7
7.8
6.1
4.9
0.4
13
12.3
M10
1.5
12.2
10.7
9.8
7.8
6.2
0.4
17
16.3
M12
1.75
15.2
12.9
11.8
8.8
7.2
0.6
19
18.2
M14
2
17.2
14.9
13.8
9.8
8.2
0.6
22
21.2
M16
2
19.2
16.9
15.8
10.9
9.1
0.6
24
23.2
M18
2.5
21.2
18.9
17.8
12.9
11.1
0.6
27
26.2
M20
2.5
24.4
20.95
19.65
13.9
12.1
0.8
30
29.2
M22
2.5
26.4
22.95
21.65
14.9
13.1
0.8
32
31
M24
3
28.4
24.95
23.65
15.9
14.1
0.8
36
35