材质 
M8
1.25
8.58
7.42
5.9
5.1
8.75
7.25
18.9
17.1
0.5
M10
1.5
10.58
9.42
7.45
6.55
10.75
9.25
22
20
0.5
M12
1.75
12.7
11.3
8.75
7.25
12.9
11.1
27
25
1
M16
2
16.7
15.3
11.4
9.6
16.9
15.1
31
29
1
M20
2.5
20.84
19.16
13.9
12.1
21
19
37.25
34.75
1
M24
3
24.84
23.16
15.9
14.1
25
23
44.25
41.75
1.6
M30
3.5
30.84
29.16
20
18
31
29
55.5
52.5
1.6
M36
4
37
35
24
22
37.25
34.75
67.5
64.5
2
M42
4.5
43
41
27
25
43.25
40.75
81.5
78.5
2
M48
5
49
47
31
29
49.25
46.75
89.75
86.25
2
M56
5.5
57.2
54.8
36.25
33.75
57.5
54.5
103.75
100.25
3
M64
6
65.2
62.8
41.25
38.75
65.5
62.5
116.75
113.25
3
M72
6
73.2
70.8
46.25
43.75
73.5
70.5
130
126
4
M80
6
81.2
78.8
51.25
48.75
81.5
78.5
142
138
4