Bridgeport 235-DC2 2 Set Screw Conn. Zinc, Box of 10
https://nsiindustries.com/product/set-screw-emt-connector-2-die-cast-zinc/
Use Bridgeport set screw EMT connectors to connect electrical metallic tubing to an electrical box or enclosure. Featuring a set-screw design and locknut, these connectors create a concrete-tight seal at the point of connection.