Leviton 5372-S00 30 amp, 250 volt, NEMA 6-30r, 2 pole, 3 wire, flush mounting receptacle, straight blade, industrial grade, Grounding,, side wired, steel strap - black. Leviton line of extra heavy-duty industrial grade receptacles are designed and manufactured to withstand the harsh conditions typically associated with industrial environments. These industrial grade devices are the electrical contractor's choice for use in factories, schools, hospitals and commercial office buildings.