材质 
M12
1.75
20.03
16
15.57
18
17.73
13.15
13.85
M14
2
23.55
18
17.57
21
20.67
14.65
15.35
M16
2
26.75
20
19.48
24
23.67
16.65
17.35
M18
2.5
29.56
22
21.48
27
26.16
18.58
19.42
M20
2.5
32.95
25
24.48
30
29.16
20.58
21.42
M22
2.5
37.29
28
27.48
34
33
21.58
22.42
M24
3
39.55
30
29.48
36
35
23.58
24.42
M27
3
45.2
32
31.38
41
40
25.58
26.42
M30
3.5
50.85
34
33.38
46
45
27.58
28.42
M36
4
60.79
44
43.38
55
53.8
35.5
36.5
M42
4.5
72.02
52
51.26
65
63.1
41.5
42.5
M48
5
82.6
58
57.26
75
73.1
47.5
48.5
M56
5.5
93.56
68
67.26
85
82.8
55.4
56.6
M64
6
104.86
75
74.26
95
92.8
61.4
62.6
M72
6
116.16
85
84.13
105
102.8
66.4
67.6