Hubbell Wiring Devices Hbl5366C.
POWER ENTRY CONNECTOR, PLUG, 2P3W, 20A 125V, 5-20P; Connector Type:Power Entry; Current Rating:20A; Connector Colour:Black, White; Connector Body Material:Nylon (Polyamide) Body; Voltage Rating VAC:125V; Contact Termination:Screw.