材质 
M2.5
0.45
6.25
10.5
10.25
3.3
3.5
M3
0.5
7.5
11.1
10.85
3.8
4
M3.5
0.6
8.75
11.2
10.95
4.55
4.75
M4
0.7
10
10.9
10.65
5.15
5.35
M5
0.8
12.5
12.3
12.05
6.35
6.6
M6
1
15
12.3
12.05
7.6
7.85
M7
1
17.5
14.3
14.05
8.65
8.9
M8
1.25
20
13.5
13.25
9.85
10.1
M10
1.5
25
14.2
13.95
12.1
12.5
M12
1.75
30
14.7
14.45
14.4
14.8
M14
2
35
15.2
14.95
16.8
17.2
M16
2
40
17.5
17.25
19
19.4
M18
2.5
45
15.5
15.25
21.5
22