材质 
M2
0.4
3.4
4.60
2
1.75
M2.5
0.45
4.4
5.60
3
2.25
M3
0.5
5.4
6.60
3
2.75
M4
0.7
7.25
8.75
4
3.70
M5
0.8
9.25
10.75
5
4.70
M6
1
11.1
12.90
6
5.70
M8
1.25
15.1
16.90
8
7.64
M10
1.5
18.95
21.05
10
9.64
M12
1.75
22.95
25.05
12
11.57
M14
2
26.95
29.05
14
13.57
M16
2
31.75
33.25
16
15.57
M18
2.5
34.75
37.25
18
17.57
M20
2.5
38.75
41.25
20
19.48
M22
2.5
42.75
45.25
22
21.48
M24
3
46.75
49.25
24
23.48
M27
3
52.5
55.50
27
26.48
M30
3.5
58.5
61.50
30
29.48
M33
3.5
64.5
67.50
33
32.38
M36
4
70.5
73.50
36
35.38
M39
4
76.5
79.50
39
38.38
M42
4.5
82.25
85.75
42
41.38
M48
5
94.25
97.75
48
47.38