The MIL-DTL-38999 Series II connectors are designed for harsh environments, offering up to 128 contacts in an insert. With a wide operating temperature range of -65 °C to 200 °C, these connectors are ideal for rugged applications. Featuring various mounting options such as front and rear wall mount, jam nut, and box mount receptacles, they provide flexibility in installation. Available in 9 shell sizes and 52 insert arrangements, these connectors utilize M39029 rear release crimp contacts for reliable connections. Constructed with aluminum shells and offering multiple plating options including gold, electroless nickel, and cadmium free finishes, they ensure durability and corrosion resistance. These connectors are MIL-DTL-38999 II compliant, meeting stringent military specifications for performance and reliability in demanding environments.