Brighton-Best 5/8"-11 NC x 2-1/8" Grade A Regular Coupling Nuts Zinc Plated - 20 per Box (303060)

� Coupling Nuts for 5/8" Diameter with 11 NC Thread (National Course) Bolts

� 2-1/8" Length

� Grade A Low Carbon Steel Coupling Nut (Meets ASTM A563)

� Zinc Plated to meet ASTM F1941 FeZn3A

� 20 per Box

Brighton-Best Coupling Nuts - Coupling nut is a threaded fastener for joining two male threads, most commonly threaded rod. Fasteners are typically made of low-carbon steel. Coarse threads are better when working with brittle materials; they are sturdier and are easier to thread and unthread compared to fine. Coarse threading also allows for thicker coatings and platings. Porteous (PFC) 00238-3000-401.