Hubbell Wiring Device-Kellems Locking Devices, Twist-Lock®, Industrial, Flush Receptacle, 30A 125V, 2-Pole 3-Wire Grounding, L5-30R, Screw Terminal, Black. Round wall outlet includes a flat face for easy plug insertion. Nylon construction provides for high impact resistance. Includes galvanized steel wrap-around strap. Galvanized steel wrap around strap. Flat face design for easy plug insertion. Nylon construction provides for high impact resistance. Oversized terminal screws. Automatic grounding staple assures grounding continuity between the mounting strap and the metal box. Back and side wired for stranded and solid wiring
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