0.768
3/4
0.642
5/8
0.515
1/2
0.452
7/16
0.388
3/8
0.324
5/16
0.750
0.260
1/4
Min.
Max.
Basic
Height
Width Across Corners
Width Across Flats
Lt (ref)
H
G
F
Nominal Size or Basic Bolt Diameter
Hewes Fastener Division
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