Rigid/IMC Grounding Bushing, Type Threadless, Set Screw, Trade Size 6 Inch, Wire Size 6 AWG to 250 KCMIL, Lug Type Lay In, Tin Plated Aluminum, Conductor Material Copper/Aluminum, Throat Type Insulated, Diameter 7-1/4 Inch, Height 1-5/16 Inch, Material Zinc Plated Malleable Iron Body, Zinc Plated Steel Set Screw, Zinc Plated Steel Clamping Screw, Approval UL 467, CSA C22.2, Used On Rigid Conduit/IMC, Applicable Standard NEMA FB-1, Temperature Rating 150 Deg C