材质 
M10
1.25
11.2
10
9.78
17.77
6.58
6.22
0.4
16
15.73
M12
1.5
13.7
12
11.73
20.03
7.68
7.32
0.6
18
17.73
M20
2
22.4
20
19.67
33.53
12.715
12.285
0.8
30
29.67
M22
2
24.4
22
21.67
37.72
14.215
13.785
0.8
34
33.38