材质 
M12
1.75
21
20.48
9
8.64
6.18
5.82
17.215
16.785
8.18
7.82
12
11.57
0.6
M14
2
24
23.48
10
9.64
7.18
6.82
20.215
19.785
9.18
8.82
14
13.57
0.6
M16
2
28
27.48
11
10.57
8.18
7.82
23.26
22.74
10.18
9.82
16
15.57
0.6
M18
2.5
31
30.38
12
11.57
9.18
8.82
26.26
25.74
11.215
10.785
18
17.57
0.6
M20
2.5
35
34.38
13
12.57
10.18
9.82
29.26
28.74
12.215
11.785
20
19.48
0.8
M22
2.5
39
38.38
15.5
15.07
11.215
10.785
31.31
30.69
14.215
13.785
22
21.48
0.8
M24
3
42
41.38
17.5
17.07
12.215
11.785
34.31
33.69
16.215
15.785
24
23.48
0.8
M27
3
47
46.38
19.5
18.98
13.715
13.285
38.31
37.69
18.215
17.785
27
26.48
1
M30
3.5
53
52.26
21.5
20.98
15.215
14.785
42.31
41.69
20.26
19.74
30
29.48
1