材质 
M8
1
10
17
8
7.78
10.95
8.5
2.1
0.36
0.16
10
9.78
M10
1|1.25
12.5
20.8
10
9.78
14.26
9.7
2.1
0.45
0.2
13
12.73
M12
1.25|1.5
15.2
24.7
12
11.73
16.5
12.1
2.1
0.54
0.24
15
14.73
M14
1.5
17.7
28.6
14
13.73
19.86
12.9
2.1
0.63
0.28
18
17.73
M16
1.5
20.5
32.8
16
15.73
23.15
15.2
3.2
0.72
0.32
21
20.67