MIL-DTL-38999 Series II connectors feature up to 128 contacts within an insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. These connectors, available in various shell sizes and insert arrangements, offer front wall mount, rear wall mount, jam nut, and box mount receptacles. Utilizing M39029 rear release crimp contacts, they ensure secure connections in aerospace and defense applications. With options for RoHS compliant finishes, including cadmium-free plating, these connectors guarantee reliable performance. The aluminum shells, along with electroless nickel and cadmium olive drab coatings, provide durability and protection against environmental factors. Suitable for use in demanding conditions, these MIL-DTL-38999 Series II connectors are essential components for critical systems.