Pass & Seymour Turnlok ; 2-Pole 4-Wire Polarized grounding specification grade locking plug in black/white color is made of nylon 6/6 to offer superior impact and corrosion resistance. It has brass blade connector contacts to offer high conductivity. Plug offers external cord grips for more secure and proper cord retention. The 3-Phase plug has double dovetail design to offer superior protection against the cord pullout forces. Plug has raised ribs to offer additional grips for turning lock/unlock.Plug has rounded back contour to reduce snags and inhibition. Scallop shell design to offer non-slip gripping surface during plug insertion and withdrawal. It has a voltage rating of 125/250 VAC and a current rating of 20 Amps. Plug has quick-thread assembly screw and cord-grip screw to offer easy installation. It has cord size of 0.385 - 1.15 Inch. Plug measures 2.200 Inch top diameter x 3.750 Inch. It is suitable for industrial applications.Plug has an integral flexible rubber cord that seals around "SO" cord to offer protection from oils/water and chips entering to the wiring chamber. Plug accommodates wire of size 4 AWG. It operates at a temperature of -40 to 75 deg C. Plug is UL listed and CSA certified. Also known as -P & S L1520-P Turnlok Plug, 4-Wire, 20A 250V, L15-20P, Black Back/White Front-Pass & Seymour L1520-P Turnlok Polarized Grounding Specification Grade Locki