The product comes in a package of MIL SERIES CONNECTOR.BOARD AND PANEL is the mount type.Also, there's STANDARD: MIL-DTL-38999, EMI SHIELDED, POLARIZED, to name a few.
D38999/27HG39CD Features
D38999/27HG39CD Applications
There are a lot of TE Connectivity Deutsch Connectors D38999/27HG39CD Circular Connectors applications.