Grounding Bushing, Type Threaded, Trade Size 3 Inch, Wire Size 14 AWG Solid to 4 AWG Standard, Lug Type Lay-In, Bronze, Conductor Material Copper, Throat Type Insulated, Diameter 4.06 Inch, Height 1.31 Inch, Material Zinc Plated Malleable Iron Body, Zinc Plated Steel Clamping Screw/Set Screw, Approval UL 514B, CSA C22.2, Used On Threaded Rigid Metal Conduit/IMC, Used with a Locknut to Terminate Rigid Metal Conduit/IMC Conduit to a Box or Enclosure