MIL-DTL-38999 Series II connectors feature up to 128 contacts housed within an insert, designed for robust environmental sealing with an operating range spanning from -65 °C to 200 °C. Offering various mounting options such as front wall, rear wall, jam nut, and box mounts, these connectors ensure versatile installation. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts for reliable connectivity. Constructed with aluminum shells and plated in options like electroless nickel and cadmium finishes, they meet stringent military specifications for performance and durability in harsh environments. With features like bayonet coupling, removable crimp contacts, and socket contact style, they guarantee secure and efficient connections for aerospace and defense applications.