Packaging is MIL SERIES CONNECTOR.CABLE AND PANEL is the mounting type.There are also other features such as STANDARD: MIL-DTL-38999, POLARIZED, COMPATIBLE CONTACT: M39029/58360, to name only a few.
D38999/20KC35AN Features
D38999/20KC35AN Applications
There are a lot of SOURIAU-SUNBANK D38999/20KC35AN Circular Connectors applications.