材质 
M16
2
24.9
29.56
17.1
16.4
27
26.16
M20
2.5
31.4
37.29
20.7
19.4
34
33
M22
2.5
33.3
39.55
23.6
22.3
36
35
M24
3
38
45.2
24.2
22.9
41
40
M27
3
42.8
50.85
27.6
26.3
46
45
M30
3.5
46.5
55.37
30.7
29.1
50
49
M36
4
55.9
66.44
36.6
35
60
58.8