... many years.4,EMT is commonly used instead of galvanized rigid conduit(GRC),as it is less costly and lighter than ... IMC/Rigid Conduit.Standard size of EMT tube for the following: SizeOutside ... ELBOW, LOCK NUT, SERVICE ENTRANCE CAP, CONDUIT BENDERIMC/RIGID CONDUIT & FITTINGINTERMEDIATE METAL CONDUIT, RIGID METAL CONDUIT, ELBOW, COUPLING, CONDUIT BUSHING, STRAP, ...