材质 
M18
2.5
29.56
15.8
15.1
27
26.16
M20
2.5
32.95
18
16.9
30
29.16
M22
2.5
37.29
19.4
18.1
34
33
M24
3
39.55
21.5
20.2
36
35
M27
3
45.2
23.8
22.5
41
40
M30
3.5
50.85
25.6
24.3
46
45
M33
3.5
55.37
28.7
27.4
50
49
M36
4
60.79
31
29.4
55
53.8
M39
4
66.44
33.4
31.8
60
58.8
M42
4.5
71.3
34
32.4
65
63.1
M45
4.5
76.95
36
34.4
70
68.1
M48
5
82.6
38
36.4
75
73.1
M52
5
88.25
42
40.4
80
78.1
M56
5.5
93.56
45
43.4
85
82.8
M60
5.5
99.21
48
46.4
90
87.8
M64
6
104.86
51
49.1
95
92.8