Hex nuts are available in ASTM A563-A and compatible with low carbon steel bolts such as ASTM A307, ASTM F1554 grade 36, SAE grade 2, and AASHTO M183. SAE grade 5 and grade 8 nuts are also available in a finished pattern.

Coupler nuts (also known as a rod coupling, rod coupling nut, coupling nut, or extension nut), is a threaded fastener for joining two male threads, most commonly threaded rods.

Knurled nuts are specialized fasteners widely used in the automotive industry due to their unique design and functionality.