MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts within a sealed insert. Operating efficiently in extreme temperatures ranging from -65 °C to 200 °C, these connectors offer reliable performance. Available in various configurations including front and rear wall mount, jam nut, and box mount receptacles, they cater to diverse installation needs. The plugs, with options for straight, RFI grounding, and standard plugs with a 90-degree cable clamp, ensure secure connections. Utilizing M39029 rear release crimp contacts, these connectors come in 9 shell sizes and 52 insert arrangements, accommodating different contact sizes. Crafted with aluminum shells and offering plating options like electroless nickel and cadmium finishes, they provide durability and corrosion resistance. RoHS certified finishes are also available, meeting environmental standards. Ideal for military and industrial applications, these connectors guarantee high performance and longevity in demanding environments.