
GR Type Conduit Outlet Box, Explosion-Proof, Dust-Ignitionproof, Malleable Iron, Unilet, GRC Hub Type. Includes: Internal Ground Screw and O-Ring, Internally Threaded Surface Cover with 3.38" Opening, 18 Cubic Inches and (2) 1" Threaded Hubs. For use with Threaded Metal Conduit.
Appleton explosionproof and dust-ignitionproof GR and GRF conduit outlet boxes are furnished with internal ground screw and O-ring. They are ideal for use in indoor and outdoor classified locations. These corrosion-resistant outlet boxes provide access for maintenance, allow the connection of different lengths of conduit, and for changing the direction of conduit.