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GOST 7786-1981
90° Flat countersunk head square neck bolts
Nom
P
dk
k max
k min
ds max
ds min
s
M5
0.8
9
4.375
3.625
5
4.52
5
M6
1
11
5.375
4.625
6
5.52
6
M8
1.25
14
6.375
5.625
8
7.42
8
M10
1.5
18
8.45
7.55
10
9.42
10
M12
1.75
23
10.45
9.55
12
11.3
12
M16
2
28
12.55
11.45
16
15.3
16
M20
2.5
35
15.55
14.45
20
19.16
20
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