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UNI 5712
Hexagon bolts with large width across flats for high strength structural bolting
Nom
P
b max
b min
s max
s min
da max
ds max
ds min
e min
k max
k min
r min
M12
1.75
23
21
22
21.16
15.2
12.7
11.3
23.91
8.45
7.55
1.2
M14
2
25
23
24
23.16
17.2
14.7
13.3
27.34
9.75
8.25
1.2
M16
2
28
26
27
26.16
19.2
16.7
15.3
29.56
10.75
9.25
1.2
M18
2.5
30
28
30
29.16
21.2
18.7
17.3
34.27
12.9
11.1
1.2
M20
2.5
33
31
32
31
24
20.84
19.16
35.03
13.9
12.1
1.5
M22
2.5
34
32
36
35
26
22.84
21.16
39.55
14.9
13.1
1.5
M24
3
37
34
41
40
28
24.84
23.16
45.2
15.9
14.1
2
M27
3
39
37
46
45
32
27.84
26.16
50.85
17.9
16.1
2
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