You get it in MIL SERIES CONNECTOR packaging.CABLE AND PANEL is the mounting type.Moreover, there are a number of other features, including STANDARD: MIL-DTL-38999, EMI SHIELDED, POLARIZED, to name just a few.
D38999/21HD35ZB Features
D38999/21HD35ZB Applications
There are a lot of TE Connectivity Deutsch Connectors D38999/21HD35ZB Circular Connectors applications.