L6-20R Connector - NEMA L6-20 Locking Connector, 20A, 220V - 240V - 250V - Iron Box # IBX-L620R Go to amazon.com Related posts The 13 best inlet box 20a 2022 FeatureNEMA L6-20R connector20A/250VIndustrial GradeUL ListedHassle Free Returns / No Restock Fee DescriptionNEMA L6-20R Locking Connector used for 20A, 250V power cords. Mates with a male L6-20P plug or inlet.