Hubbell Wiring Device-Kellems semi-flush 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 receptacles have thermoplastic housing with a polycarbonate terminal retainer for impact & corrosion resistance and durability. They feature two-gang, semi-flush surface mount housing design for partial mounting of two devices into the wall surface. Choose from a wide range of these grey coloured 20 / 30A receptacles, available in voltage ratings of 125, 250, 480 and 600VAC.