Wiring Device-Kellems Twist-Lock® Locking Flanged Inlet, 3-Phase Extra Heavy Duty Grounding Standard Screw Mount, 600 VAC/250 VDC, 50 A, 3 Pole, 4 Wires, Industrial Grade, -40 to 75 deg C, Pressure Screw Terminal, Steel, Metallic, 2.17 x 3.5 x 2.56 in