EATON 4409A-BOX N 20 Amp 125V 5-20 Commercial Grade Plug & Connector Commercial grade plugs & Connectors - NEMA 5-20, 2-pole/3-wire Designed for light commercial applications, where ease-of-use, value and quality are critical Commercial grade plugs & Connectors NEMA 5-20 - 4409, 4409an, 4228