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ASME/ANSI B18.5.2.1M-2011
Metric round Head Short Square Neck Bolts
Nom
P
ds max
ds min
dk max
k max
k min
e max
e min
s max
s min
k1 max
k1 min
r max
r min
M6
1
6
5.21
14.2
3.6
3
9.16
7.64
6.48
5.88
3
2.4
0.5
0.2
M8
1.25
8
7.04
18
4.8
4
12.13
10.2
8.58
7.85
3
2.4
0.8
0.4
M10
1.5
10
8.86
22.3
5.8
5
14.96
12.8
10.58
9.85
4
3.2
0.8
0.4
M12
1.75
12
10.68
26.6
6.8
6
17.96
15.37
12.7
11.82
4
3.2
0.8
0.4
M14
2
14
12.5
30.5
7.9
7
20.79
17.97
14.7
13.82
4
3.2
1.2
0.6
M16
2
16
14.5
35
8.9
8
23.62
20.57
16.7
15.82
5
4.2
1.2
0.6
M20
2.5
20
18.16
43
10.9
10
29.47
25.73
20.84
19.79
5
4.2
1.6
0.8
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