IMC/Rigid Conduit Connector, Type Set Screw, Threadless, Throat Type Insulated, Trade Size 2-1/2 Inch, Diameter 3.38 Inch, Length 3.19 Inch, Thread Length 1 Inch, Material Malleable Iron, Constructional Feature Concrete-Tight, Standard Package 10, Approval UL 514B, Used On IMC/Rigid Conduit, Applicable Standard NEMA FB-1