Square Head machine 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:

ASTM & DIN 479

Material:

Carbon Steel, Mild Steel, Alloy Steel & Stainless Steel

Dia Range:

Metric Size: M12 TO M68
Imperial Size: 1/4” TO 3”