IMC/Rigid Conduit Connector; Type Set Screw; Throat Type Insulated; Trade Size 3 Inch; Diameter 4 Inch; Length 3 Inch; Thread Length 3/8 Inch; Material Ball Burnished Mirror Smooth Die-Cast Zinc; Constructional Feature Concrete-Tight; Standard Package 12; 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