MIL-DTL-38999 Series II connectors offer robust connectivity with up to 128 contacts, featuring environmentally sealed inserts for reliable performance in harsh conditions. Operating within a wide temperature range from -65 °C to 200 °C, these connectors come in various configurations including front and rear wall mount, jam nut, and box mount receptacles. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts for secure connections. Crafted from durable aluminum, with plating options such as cadmium and nickel, these connectors ensure longevity and conductivity. Meeting military specifications, they are ideal for demanding applications in aerospace, defense, and industrial settings.