Use the Bridgeport 240 1/2" EMT Steel Coupling to connect two lengths of EMT conduit. The steel body is zinc plated for corrosion resistance. Taping the coupling creates a concrete tight seal to prevent the entrance of concrete aggregate into the raceway. This EMT coupling is furnished with tri-drive slot/Phillips/Robertson head screws which ensure that the connection between the two lengths of EMT conduit stays in place. The EMT coupling meets Nema Standard: FB-1 and UL Standard: UL-514B.