Grounding LockNut for Threaded RMC/IMC, Steel, Trade Size 4 in, Overall Length 5 3/8 in, Finish Zinc Plated, Compatible Conduit Type RMC, Thread Size 4 In.-8, Thread Type NPT, Thread Gender Female, Conduit Fitting Type Locknut, Standards CSA Certified, UL 514B, UL Listed, For Use With Fittings, Threaded RMC, For Conduit Type RMC, IMC, Overall Height 7/16 in, Overall Width 5 1/32 in, Weight 0.27 lb, Color Gray, Compatible Conduit Trade Size 4 in, Connection Type Threaded, Includes Clamp