20 & 30 Amp, 125/250, 250, 480 Volt, 3 Pole, 4 Wire, Industrial Grade Locking Flanged Outlets, Grounding

The locking flanged outlet wiring devices are designed for industrial and commercial applications. The nylon housing of insulated design shields exposed metal parts on hand-held side. The industrial strength contacts resist heat rise, provide excellent conductivity. The internal dust shield design keeps terminals free of contaminants.