Rigid Or IMC To Enclosure Set Screw Connector 5″, Iron
https://dev.nsiindustries.com/product/rigid-or-imc-to-enclosure-set-screw-connector-5-iron/
The Bridgeport 5″ Malleable Iron Rigid or IMC To Enclosure Set Screw Connector joins unthreaded rigid or IMC conduit to a box or enclosure. The seal is concrete tight. The connection is secured via a set screw.