Hubbell Wiring Device-Kellems watertight Safety-Shroud Twist-Lock plugs prevent accidental disconnection of wires due to vibrations or any movement in construction and industrial applications. These male water-tight plugs have PBT housing with a polycarbonate terminal retainer, brass blades and a neoprene watertight gland for impact resistance and durability. They feature a superior cord grip and impact-resistant shroud to protect wire termination from excess strains and plug blades from bending or breaking, respectively. Selected models also come without shroud? having thermoplastic body and nickel-plated brass blades. Choose from a wide range of these black & white coloured 20 / 30A plugs, available in voltage ratings of 120 / 208, 125, 250, 277, 480 and 600VAC.