IMC/Rigid Conduit Hub, Type Male Threaded, Throat Type Insulated, Trade Size 5 Inch, Size 6-7/8 Inch Dia x 3-3/8 Inch L, Constructional Feature Dusttight, Raintight, Watertight, Ground Type Bonding Screw, Material Zinc Plated Malleable Iron, Approval UL 514B, CSA C22.2, Used On Rigid Conduit/IMC, Applicable Standard Federal Specification W-F-408E