Combination Clamp 1/2″ to 1″, Brass Screw with Strap and Hub
https://nsiindustries.com/product/combination-clamp-1-2-to-1-brass-screw-with-strap-and-hub-3/
The Bridgeport 1/2″ to 1″ Brass Screw Strap Combination Clamp with 1″ Hub and ground wire to terminate set screw is used for making connection with 4, 6, or 8 AWG copper wire through a threaded conduit.