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GOST 17673-1981
120° Countersunk square bolts
Nom
P
ds
dk
k max
k min
s
M5
0.8
5
11
6.375
5.625
5
M6
1
6
14
7.45
6.55
6
M8
1.25
8
18
9.45
8.55
8
M10
1.5
10
23
11.55
10.45
10
M12
1.75
12
28
13.55
12.45
12
M16
2
16
35
16.55
15.45
16
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