5/16-18 x 3/4 A307 Grade A Square Hd Machine Bolt Hot Dip Galvanized

PICTURES ARE REPRESENTATIVE OF ITEM, BUT ARE NOT OF THE ACTUAL ITEM. Product dimensions, finish, head markings, thread length, stamping shape or forging shape, etc. Products are guaranteed to meet the specs to which they are manufactured. Specs allow for tolerances in dimension and shape, which can vary from lot to lot. Don't see what you need?

Square head bolts, or square head machine bolts offer a large bearing area for positive gripping; primarily used nowadays for aesthetic projects that create a rustic look or to match existing fasteners; comes in both fully threaded and partially threaded pitches. Square head bolts are sometimes selected over hex heads because the head will fit neatly in a channel.

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