Sigma ProConnex 1/2-in Electrical (EMT) Zinc-plated Steel Compression Connector Conduit Fittings (5-Pack) in the Conduit Fittings department at Lowes.com
EMT compression connector - UL Listed - TPMCSTEEL
Commercial Electric 3/4 in. Electrical Metallic Tubing (EMT) Compression Connector (5-Pack) - Yahoo Shopping
Thomas & Betts TC112A Steel City Compression Connector | Standard Electric Supply Co.