Service Entrance Watertight Connector 1-1/2″ with 0.865″ Opening
https://nsiindustries.com/product/service-entrance-watertight-connector-1-1-2-with-0-865-opening/
The Bridgeport 1-1/2″ Zinc Die Cast Service Entrance Watertight Connector with 0.865″ Opening securely creates a watertight seal around service entrance cable. The compression connection secures the entrance cable.