Heavy Structural Bolt

A heavy structural bolt is a hex head bolt for structural steel connections. It is used where a high-strength joint is needed.

A heavy structural bolt joins steel members in structural steelwork. It takes a nut and often a washer of the same thread and class. The bolt is set in a close-fitting hole and tightened with a wrench or torque tool.

This kind of bolt is often made in alloy steel, stainless steel 304 or steel. The material and grade affect strength and corrosion resistance.

This is a general guide to checking this kind of part. It says nothing about any supplier's parts.

Ask for a certificate of conformance and a mill test certificate with the grade and heat number. On receipt, check the head marking, dimensions and thread.