OCSParts L14-20R NEMA L14-20 Grounding Locking Receptacle, 20A 125/250V AC, 3 Pole 4 Wire, cUL Listed. Grounding locking receptacle, 20A 125/250V AC, 3 Pole 4 wire, cUL Listed, NEMA l14-20. Industrial grade grounding locking receptacle with 3 Poles and 4 wires.
eBay