Bridgeport EWR-1210 4 IN Serv. Entr. Cap Thread, Box of 1
https://testing.nsiindustries.com/product/bridgeport-ewr-1210-4-in-serv-entr-cap-thread-box-of-1/
The Bridgeport 4″ Rigid or IMC Conduit Threaded Aluminum Entrance Cap serves as a connection point for service entrance wires. This threaded type entrance cap features three holes with 1-3/4″ diameter or four holes with 1-1/8″ diameter.