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