Appleton NTCC-350 Conduit Coupling

Appleton NTCC-350 threadless compression coupling, 3-1/2 in trade size, joins lengths of rigid metal conduit (RMC) or IMC with a compression connection—no threads required. Outside diameter 4.88 in; length 5.25 in. This unit is manufactured from malleable iron and zinc electroplated for corrosion resistance, and Appleton marks it Threadless and Concretetight, indicating a tight, crush-resistant seal in concrete or plaster-filled installations. It complies with UL 514B and CSA C22.2 No. 18.3, with CSA 065178 certification and NEMA FB-1 listing for dependable, code-compliant performance. The NTCC-350 is intended for joining lengths of steel EMT to rigid metal conduit or IMC, providing a quick, secure field assembly without threaded connections and reducing the need for set screws. Ideal for commercial and industrial electrical runs where space is limited and rigid conduit integrity is critical, this 3-1/2 inch conduit coupling delivers a robust, code-approved solution for durable, long-lasting installations.