Pass and Seymour L520R Turnlok Receptacle Single, 2pole 3wire, 20amp 125v 
Features include:

    • Compact, impact-resistant nylon face and body are ultrasonically welded together for unrivaled strength.
    • Face color coding by voltage facilitates locating and mating of proper devices.
    • One piece, high-grade brass contacts offer excellent conductivity and heat-rise resistance.
    • Clearly marked NEMA configuration, rating, and third-party listing on each unit's face.
    • Single-piece, solid brass mounting strap is free of easily loosened rivets found on other brands.
    • Side and external screw-pressure-plate back wire capability.
    • Accepts #14 - #10 AWG.