MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts within an insert for secure connectivity. These connectors are sealed to protect against environmental factors, with an impressive operating temperature range from -65 °C to 200 °C. Offering various mounting options such as front and rear wall mount, jam nut, and box mount receptacles, they cater to diverse installation needs. Available in 9 shell sizes and 52 insert arrangements, these connectors use M39029 rear release crimp contacts, ensuring reliable performance. Crafted from aluminum with plating options including cadmium and nickel, they meet stringent military specifications for durability. Ideal for aerospace, defense, and industrial applications, these connectors guarantee high conductivity and longevity in demanding settings.