https://www.lowes.com/pd/AC-WORKS-Heavy-duty-CS6375-FC-wiring-device-rated-50A-125-250V-locking-flange-power-inlet-with-front-cover-Built-for-residential-commercial-and-industrial-use-with-weather-tight-seal-and-strain-relief-Works-with-6-AWG-copper-wire-Includes-1-year-warranty/5017869599
AC WORKS CS6375-FCG 50-Amp 125/250 -Volt NEMA 4-wire grounding Heavy-duty Locking Plug , Black in...