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GOST 7802-1981
Mushroom head square neck bolts
Nom
P
ds
dk
k
s
k1 min
M5
0.8
4.48
11
2.5
5
3
M6
1
5.35
14
3
6
4
M8
1.25
7.19
18
4
8
5
M10
1.5
9.03
23
5
10
6
M12
1.75
10.86
28
6
12
8
M16
2
14.70
35
8
16
10
M20
2.5
18.38
44
10
20
12
M24
3
22.05
52
12
24
15
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