材质 
M6
1
6
10
4
10.9
M8
1.25
8
12
5
13.1
M10
1.5
10
14
6
15.3
M12
1.75
12
17
7
18.7
M14
2
14
19
8
20.9
M16
2
16
22
9
23.9
M18
2.5
18
24
10
26.2
M20
2.5
20
27
11
29.6
M22
2.5
22
30
12
33
M24
3
24
32
13
35
M27
3
27
36
15
39.6
M30
3.5
30
41
17
45.2
M36
4
36
50
20
55.4
M42
4.5
42
60
23
66.4
M48
5
48
70
26
76.9