材质 
M5
0.8
3.5
8
5
4.82
M6
1
4
10
6
5.82
M8
1.25
5.5
13
8
7.78
M10
1.5
7
17
10
9.78
M12
1.75
8
19
12
11.73
M16
2
10
24
16
15.57
M20
2.5
13
30
20
19.48
M24
3
15
36
24
23.48
M27
3
17
41
27
26.48
M30
3.5
19
46
30
29.48
M33
3.5
21
50
33
32.38
M36
4
23
55
36
35.38
M39
4
25
60
39
38.38
M42
4.5
26
65
42
41.38
M45
4.5
28
70
45
44.38
M48
5
30
75
48
47.38
M52
5
33
80
52
51.26