1-1/2" set screw couplings are used in dry locations to connect the ends of two 1-1/2" unthreaded rigid or IMC conduits together. Steel set screw couplings provide concrete tight connections when taped. Garvin Industries' heavy gauge steel construction maintains mechanical protection and solid grounding of one conduit to another. These set screw couplings eliminate the need to thread bald conduits to fit old threaded couplings. Set screw couplings are zinc electroplated for excellent corrosion protection in damp locations.