EMT Coupling; Type Set Screw; Trade Size 2-1/2 Inch; Diameter 3-5/16 Inch; Length 4-5/16 Inch; Material Zinc Electroplated Steel; Constructional Feature Concrete Tight; Standard Package 10; Approval UL 514B, UL (Canada and US); Used On EMT Conduit; RoHS/REACH Compliant; Applicable Standard Federal Specification A-A-50553, NEMA FB-1, LEED