材质 
M16
2
16.7
15.3
27
26.16
31.18
29.56
10.75
9.25
18.2
0.6
M20
2.5
20.84
19.16
34
33
39.26
37.29
13.4
11.6
22.4
0.8
M22
2.5
22.84
21.16
36
35
41.57
37.55
14.9
13.1
24.4
0.8
M24
3
24.84
23.16
41
40
47.34
45.2
15.9
14.1
26.4
1
M27
3
27.84
26.16
46
45
53.12
50.85
17.9
16.1
30.4
1.2
M30
3.5
30.84
29.16
50
49
57.74
55.37
19.75
17.65
33.4
1.2
M36
4
37
35
60
58.8
69.28
66.44
23.55
21.45
39.4
1.5