PCB mount connector
https://www.digikey.com/product-detail/en/conec/163A17519X/626-1894-ND/3838176
Its Datasheet:
https://media.digikey.com/pdf/Data%20Sheets/Conec%20PDFs/163A17519X.pdf
Plain HD78 shell, has links to its pins so I can order them separately:
https://www.digikey.com/product-detail/en/te-connectivity-aerospace-defense-and-marine/204509-1/1122-1183-ND/299474
Cool datasheet for Hammond 1553B boxes:
https://media.digikey.com/pdf/Data%20Sheets/Hammond%20PDFs/1553%20Color%20Series.pdf