材质 
M10
1.5
9.5
8
16
15.57
M12
1.75
12.2
10.4
18
17.57
M16
2
15.9
14.1
24
23.16
M18
2.5
16.9
15.1
27
26.16
M20
2.5
19
16.9
30
29.16
M22
2.5
20.2
18.1
34
33
M24
3
22.3
20.2
36
35
M27
3
24.7
22.6
41
40
M30
3.5
26.4
24.3
46
5
M33
3.5
29.5
27.4
50
49
M36
4
31.9
29.4
55
53.8
M39
4
34.3
31.8
60
58.8
M42
4.5
34.9
32.4
65
63.1
M45
4.5
36.9
34.4
70
68.1
M48
5
38.9
36.4
75
73.1
M52
5
42.9
40.4
80
78.1
M56
5.5
45.9
43.4
85
82.8
M60
5.5
48.9
46.4
90
87.8
M64
6
52.4
49.4
95
92.8