Use the Bridgeport 240-DC 1/2" EMT Zinc Coupling to connect two lengths of EMT conduit. The die-cast zinc body provides corrosion resistance for long-term use. 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. This EMT coupling meets Nema Standard: FB-1 and UL Standard: UL-514B and can also be used with aluminum EMT.