Enclosure Grounding Connectors and Couplings, 1″, Brass
https://nsiindustries.com/product/enclosure-grounding-connectors-and-couplings-1-brass/
Use the Bridgeport Mighty-Bond 1″ Brass Enclosure Grounding Connectors and Couplings with a zinc die cast locknut and stainless steel set screws to secure one continuous length of grounding conductors to an enclosure through a 1″ knockout.