... for 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 DiameterInside DiameterWall ... ALUMINUM/STEEL CONNECTOR, COUPLING, STRAP, PULL ELBOW, LOCK NUT, SERVICE ENTRANCE CAP, CONDUIT BENDERIMC/RIGID CONDUIT & FITTINGINTERMEDIATE METAL CONDUIT, RIGID METAL ...