Eastman 4-3/8 Inch Long Pattern Compression Coupling, 1 Inch IPS, Galvanized Steel, 20566 - Pipe Fittings - Amazon.com
Sigma ProConnex 1-in Rigid / IMC Zinc-plated Steel Compression Coupling Conduit Fittings in the Conduit Fittings department at Lowes.com
STZ 1/2 in. Galvanized Iron Compression Coupling 311 CCL-12 - The Home Depot
EASTMAN 1-1/2 in. IPS x 5 in. Long Pattern Galvanized Steel Compression Coupling EZ-20570 - The Home Depot
Eastman 4-5/8 Inch Long Pattern Compression Coupling, 1-1/4 Inch IPS, Galvanized Steel, 20568 - Pipe Fittings - Amazon.com
Sigma ProConnex 1/2-in Electrical (EMT) Zinc-plated Steel Compression Coupling Conduit Fittings (5-Pack) in the Conduit Fittings department at Lowes.com