This product is packaged in a MIL SERIES CONNECTOR box.CABLE AND PANEL indicates that the device is mounted.Furthermore, there are other features such as STANDARD: MIL-DTL-38999, EMI SHIELDED, POLARIZED, to name a few.
D38999/23HJ4XD Features
D38999/23HJ4XD Applications
There are a lot of TE Connectivity Deutsch Connectors D38999/23HJ4XD Circular Connectors applications.