LockNut for Threaded RMC/IMC, 316 Stainless Steel, Trade Size 4 in, Overall Length 5 1/4 in, Finish Polished, Compatible Conduit Type RMC, IMC, Conduit Fitting Type Locknut, Standards File #E308159, UL514B, For Use With Threaded Metallic Conduit, For Conduit Type RMC, IMC, Weight 0.25 lb, Compatible Conduit Trade Size 4 in, Inside Diameter 4.41 in