Hubbell Wiring Device-Kellems surface mount Twist-Lock receptacles connect electrical equipment to the electrical grid while preventing accidental disconnection of wires due to vibrations or any movement in construction and industrial applications. These female, surface mount receptacles have thermoplastic housing with a polycarbonate terminal retainer for impact & corrosion resistance and durability. They feature one gang, surface mount housing design for installation on the surface without cutting into walls. Choose from a wide range of these grey coloured 20 / 30A receptacles, available in voltage ratings of 120 / 208, 125, 250, 480 and 600VAC.