EMT Conduit Coupling; Type Set Screw; Trade Size 2-1/2 Inch; Diameter 3.26 Inch; Length 4 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 EMT Conduit; ROHS Compatible; Applicable Standard Federal Specification A-A-50553, NEMA FB-1; Includes Tri Drive Slot/Phillips/Robertson Head Screw