Ground Clamp, 1/2″ to 1″, Brass Screw with Protective Armor
https://nsiindustries.com/product/ground-clamp-1-2-to-1-brass-screw-with-protective-armor-2/
Use the Bridgeport 1/2″ to 1″ Brass Screw Protective Clamp with Bare Wire to make connections with 4, 6, or 8 AWG copper ground wire and copper, iron or steel grounding pipe or grounding electrode.