材质 
M8
1.25
33.5
31
48
16
8
7.19
M10
1.5
39
36
60
20
10
9.03
M12
1.75
43.5
40
72
24
12
10.86
M16
2
54
50
96
32
16
14.70
M20
2.5
63
58
120
40
20
18.38
M24
3
74
68
144
48
24
22.05
M30
3.5
87
80
180
60
30
27.73
M36
4
102
94
216
72
36
33.40
M42
4.5
115
106
252
84
42
39.08
M48
5
130
120
288
96
48
44.75
M56
5.5
151
140
336
112
56
52.43
M64
6
172
160
384
128
64
60.10
M72
6
192
180
432
144
72
68.10