MIL-DTL-38999 Series II connectors offer robust connectivity with up to 128 contacts in an insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Featuring various mounting options including front and rear wall mount, jam nut, and box mount receptacles, these connectors ensure secure installation. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts for reliable connections. Constructed with aluminum shells and plated with options like electroless nickel, they provide durability and corrosion resistance. With RoHS certified finishes, these connectors meet environmental standards, making them ideal for military and industrial applications.