材质 
M10
1.5
12.2
10.7
9.8
7.6
6.4
0.4
24
23.2
M12
1.75
15.2
12.9
11.8
8.8
7.2
0.6
30
29.2
M16
2
19.2
16.9
15.8
10.8
9.2
0.6
36
35
M20
2.5
24.4
20.95
19.65
13.9
12.1
0.8
41
40
M22
2.5
26.4
22.95
21.65
14.9
13.1
0.8
46
45
M24
3
28.4
24.95
23.65
15.9
14.1
0.8
55
53.8