材质 
M6
1
6
10
4
10.9
1.6
4
M8
1.25
8
13
5.3
14.2
2
4
M10
1.5
10
16
6.4
17.6
2.5
4
M12
1.75
12
18
7.5
19.9
3.2
5
M14
2
14
21
8.8
22.8
3.2
5
M16
2
16
24
10
26.2
4
6
M18
2.5
18
27
12
29.6
4
6
M20
2.5
20
30
12.5
33
4
6
M22
2.5
22
34
14
37.3
5
7
M24
3
24
36
15
39.6
5
7
M27
3
27
41
17
45.2
5
8
M30
3.5
30
46
18.7
50.9
6.3
9
M36
4
36
55
22.5
60.8
6.3
10
M42
4.5
42
65
26
71.3
8
12
M48
5
48
75
30
82.6
8
12