Square Bolts

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.


Product Description

Coating   Black, Electro Galvanized, Hot dip Galvanized
Grade   ASTM A307
Standard   Imperial Size
Dia Range   ¼” TO 2”



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