Clamp-Type Connector, 3/4″, Zinc-Electroplated Steel
https://hotfix.nsiindustries.com/product/clamp-type-connector-3-4-zinc-electroplated-steel/
Use the Bridgeport 643 3/4″ Two-Piece Zinc-Electroplated Steel Clamp-Type Connector with a 3/4″ KO to connect nonmetallic cables 0.25″ to 0.83″ to a box or enclosure without a locknut.