IMC/Rigid Conduit Connector; Type Set Screw; Throat Type Insulated; Trade Size 3-1/2 Inch; Diameter 4.5 Inch; Length 3.56 Inch; Thread Length 1 Inch; Material Ball Burnished Mirror Smooth Die-Cast Zinc; Constructional Feature Concrete-Tight; Standard Package 6; Approval UL 514B, UL (Canada and US), CSA; Used On IMC/Rigid Conduit; ROHS Compatible; Applicable Standard Federal Specification A-A-50553, NEMA FB-1; Insulation Temperature Rating 105 Deg C