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JG/T 5057.8-1995
Construction machinery and equipment high strength bolts with hexagon flange-reduced shank—Type B
Nom
P
d1
da max
dc max
ds max
ds min
e min
k max
r min
s max
s min
Lf max
M12
1.75
10.86
15.2
26.6
12
11.73
19.68
10.4
0.25
18
17.57
3
M14
2
12.7
17.7
30.5
14
13.73
22.58
12.4
0.3
21
20.16
3
M16
2
14.7
20.7
35
16
15.73
25.94
14.1
0.35
24
23.16
3
M18
2.5
16.38
23.2
39
18
17.73
29.56
15.9
0.37
27
26.16
3
M20
2.5
18.38
25.7
43
20
19.67
32.6
17.7
0.4
30
29.16
4
M22
2.5
20.38
28
47
22
21.67
37.29
19.5
0.5
34
33
4
M24
3
22.05
30.3
51
24
23.67
39.55
21.4
0.6
36
35
4
M27
3
25.05
34.6
57
27
26.67
45.2
24.1
0.7
41
40
4
M30
3.5
27.73
37.9
63
30
29.67
50.85
26
0.8
46
45
4
M33
3.5
30.73
41.2
70
33
32.61
55.37
29.5
0.9
50
49
5
M36
4
33.4
44.6
77
36
35.61
60.79
31.7
1
55
53.8
5
M39
4
36.4
47.8
83
39
38.61
66.44
33.5
1.1
60
58.8
5
M42
4.5
39.08
51.4
90
42
41.61
70.02
37.4
1.2
65
63.8
5
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