E-Z Lock® Insulated Duplex AC/MC Connector 3/8″, Die Cast Zinc
https://dev.nsiindustries.com/product/e-z-lock-insulated-duplex-ac-mc-connector-3-8-die-cast-zinc-2/
Use Bridgeport AC/MC locknut connectors to connect two AC/MC/FMC cables to a box or enclosure. Simply snap the cables into the connector and then tighten the locknut to assemble into an electrical box.
 
													