Bridgeport 261-DC 3/4 IN Comp. Cplg., Box of 25
https://nsiindustries.com/product/emt-screw-on-compression-coupling-3-4-zinc-concrete-tight/
The Bridgeport 3/4″ Zinc Screw-on Compression Coupling ensures a secure, concrete-tight connection between two lengths of EMT conduit. The coupling uses a screw-on compression fitting to keep the EMT conduit locked in place.