Fire Alarm Coupling; Type Set Screw; Trade Size 3/4 Inch; Material Red Powder Coated Steel; Constructional Feature Concrete-Tight; Standard Package 250; Approval UL 514B, UL (Canada and US); Used On Fire Alarm EMT Conduit; ROHS Compatible; Applicable Standard Federal Specification A-A-50553, NEMA FB-1; Includes Tri Drive Slot/Phillips/Robertson Head Screw