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heavy hex bolts, structural bolt

Heavy Hex Bolt

Several ASTM specifications require a hex head that is larger than a standard (finished) hex head. These specifications include: A193, A320 and A307B. Although A325 and A490 bolts also require a heavy hex head, please refer to Structural Bolts for dimensional specifications, since these bolts have shorter thread lengths than standard heavy hex bolts.

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Description

Heavy Hex Bolt

Heavy hex bolts can be used for many different applications that include fastening wood, steel, and other construction materials for projects such as docks, bridges, highway structures, and buildings. With forged heads are also commonly used as headed anchor bolts. Heavy hex bolts come in 1/2″ diameter through 2-1/2″ diameter in most ASTM, AASHTO, and SAE specifications.

Bolt lengths ≤ 6″: Thread length = (2 X diameter) + 1/4″
Bolt lengths > 6″: Thread length = (2 X diameter) + 1/2″

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