Conduit Grounding Bushing; Type Threaded; Trade Size 4 Inch; Wire Size 14 to 2/0 AWG; Lug Type Lay In, Aluminum; Conductor Material Copper/Aluminum; Throat Type Insulated; Diameter 5-3/16 Inch; Height 1-1/16 Inch; Material Zinc Plated Malleable Iron; Approval UL 467, CSA C22.2; Used On Threaded Rigid Conduit/IMC; Temperature Rating 150 Deg C