Superstrut 3/4 in. Strut Fitting Universal Strut Pipe Clamp - Silver Galvanized Z703 3/4EG-25 - The Home Depot
3/4" EMT Strut Clamps for Rigid Conduit and Pipe, 4 Packs Universal Steel Strut Clamps for Rigid Conduit and EMT, Standard Electro-Galvanized EMT Strut Clamps Assembled with Bolt and Nut - Amazon.com
Caddy Erico SCH6B Booted SCH Strut Clamp for 3/8-Inch EMT/Cable to Strut, (100-Pack) - Amazon.com