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BS 4933-11-1973
120° Countersunk square bolts
Nom
P
dk max
dk min
ds max
ds min
k max
k min
s max
s min
M5
0.8
11.25
8.65
5.48
4.52
4.25
3.5
5.48
4.52
M6
1
13.5
10.38
6.48
5.52
4.75
4
6.48
5.52
M8
1.25
18
13.84
8.58
7.42
6.25
5.5
8.58
7.42
M10
1.5
22.5
17.3
10.58
9.42
7.9
7
10.58
9.42
M12
1.75
27
20.76
12.7
11.3
9.4
8.5
12.7
11.3
M16
2
36
27.68
16.7
15.3
12.1
11
16.7
15.3
M20
2.5
45
34.6
20.84
19.16
15.1
14
20.84
19.16
M24
3
54
41.52
24.84
23.16
17.6
16.5
24.84
23.16
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