Square Head Bolts Stainless Steel 304 316
Square head bolts were the industry standard prior to hex bolts gaining prominence. Square bolts are now most commonly used for aesthetic purposes to provide a rustic look in a new structure or to match existing fasteners in an older structure.
Standard Thread Lengths
Bolt lengths < 6″: Thread length = (2 X diameter) + 1/4″
Bolt lengths > 6″: Thread length = (2 X diameter) + 1/2″
Square Head Dimensions
Bolt Diameter
D
F
C
H
Body Diameter
Width Across Flats
Width Across Corners
Height
Max
Basic
Max…