Conduit Combination Coupling; Installation Set Screw EMT to Set Screw Rigid/IMC; Trade Size 1 Inch; Constructional Feature Concrete-Tight; Material Zinc Electroplated Steel; Size 1-13/16 Inch; Standard Package 50; Approval UL (Canada and US); Used On Rigid and IMC Conduit; ROHS/TCLP Compliant; Applicable Standard Federal Specification A-A-50553, NEMA FB-1; Includes Tri-Drive Slot/Phillips/Robertson Head Screw