Rigid, EMT or IMC Conduit Clamp-On Aluminum Entrance Cap 1-1/2″
https://dev.nsiindustries.com/product/rigid-emt-or-imc-conduit-clamp-on-aluminum-entrance-cap-1-1-2/
The Bridgeport 1-1/2″ Rigid, EMT or IMC Conduit Clamp-On Aluminum Entrance Cap serves as a connection point for service entrance wires. This clamp-on type entrance cap features one 7/16″ dia hole, two 5/8″ dia holes or three 3/4″ dia holes.