材质 
M10
1.5
22
19
14
13.3
19.65
18.35
10.58
9.42
5.375
4.625
6.6
5.4
0.5
10
9.03
M12
1.75
24.5
21
18
17.3
24.65
23.35
12.7
11.3
7.45
6.55
8.75
7.25
0.5
12
10.86
M16
2
31
27
22
21.16
30.65
29.35
16.7
15.3
8.45
7.55
10.75
9.25
1
16
14.70
M20
2.5
34
29
30
29.16
38.8
37.2
20.84
19.16
10.45
9.55
13.4
11.6
1
20
18.38
M22
2.5
39
34
33
32
42.8
41.2
22.84
21.16
12.55
11.45
14.9
13.1
1
22
20.38