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GR Type Conduit Outlet Box, Explosion-Proof, Dust-Ignitionproof, Aluminum, Unilet, GRT Hub Type. Includes: Internal Ground Screw and O-Ring, Internally Threaded Surface Cover with 3.88" Opening, 18 Cubic Inches and (3) 3/4" 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.