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GB/T 32076.3-2015
High-strength structural bolting saaemblies for preloading-Part 3:System HR-Hexagon bolt with large width across flats and nut assemblies
Nom
P
da max
ds max
ds min
e min
k max
k min
r min
s max
s min
M12
1.75
15.2
12.7
11.3
23.91
7.95
7.05
1.2
22
21.16
M14
2
17.2
14.7
13.3
26.17
9.25
8.35
1.2
24
23.16
M16
2
19.2
16.7
15.3
29.56
10.75
9.25
1.2
27
26.16
M18
2.5
21.7
18.7
17.3
32.95
12.4
10.6
1.5
30
29.16
M20
2.5
24.4
20.84
19.16
35.03
13.4
11.6
1.5
32
31
M22
2.5
26.4
22.84
21.16
39.55
14.9
13.1
1.5
36
35
M24
3
28.4
24.84
23.16
45.2
15.9
14.1
1.5
41
40
M27
3
32.4
27.84
26.16
50.85
17.9
16.1
2
46
45
M30
3.5
35.4
30.84
29.16
55.37
19.75
17.65
2
50
49
M36
4
42.4
37
35
66.44
23.55
21.45
2
60
58.8
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