Bridgeport 560-DC2 3/8 IN Strap-Type Conn. Sing.Scr, Box of 50
https://nsiindustries.us.com/product/single-screw-strap-type-ac-mc-connector-3-8-tri-drive-screw/
Use Bridgeport single screw strap type connectors to connect AC/MC cable to an electrical box or enclosure. This model is also listed for use with MC-PCS, flexible metal conduit and is CSA listed for ACG90.