Orbit RC-600 6 Inch Rigid Threaded CouplingsOrbit RC 600 RC 600 Product Description Orbit Industries threaded couplings are used to join two ends of threaded rigid conduits or IMC conduits together. They can also be used with chase nipples and connectors to bond threaded conduits to electrical junction boxes or enclosures. Orbit Industries have versatile threaded design works and they are all standard threaded couplings. With related threaded connectors, these couplings are often used to