MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts within an insert and offering reliable performance in extreme conditions. With an operating temperature range spanning from -65°C to 200°C, these connectors are suitable for a wide range of applications. Available in various mounting styles including front and rear wall mount, jam nut, and box mount receptacles, they provide versatility in installation. The connectors come in 9 shell sizes and 52 insert arrangements, accommodating different contact configurations with M39029 rear release crimp contacts. Constructed with aluminum shells and offering plating options such as electroless nickel and cadmium finishes, they ensure durability and corrosion resistance. Meeting MIL-DTL-38999 II military specifications, these connectors are ideal for demanding environments where reliable electrical connections are essential.