Heavy Hex Nut

A heavy hex nut is a nut with a larger width and height than a standard hex nut. It is used on high strength bolts and studs in structural and pressure applications.

A heavy hex nut takes a bolt of the same thread and class and holds a joint under high load. Its larger body spreads the clamping force over a wider area than a standard nut. It often pairs with a matching heavy hex bolt and a washer on structural work.

Hot-dipped galvanising gives a thick zinc coating for outdoor and corrosive environments. It is a different finish from zinc plating and is not a substitute for it. The coating protects the steel from rust.

This kind of part is usually made in steel. The steel grade is chosen to match the bolt or stud it will be used with. It is not normally supplied in stainless steel for this heavy pattern.

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

Ask for a mill test certificate or a certificate of conformance for the grade and finish. On receipt, check the thread fit, the across flats dimension and the marking on the nut. Confirm the coating thickness and coverage meet the stated finish.