MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in a sealed insert. With an operating temperature range from -65 °C to 200 °C, these connectors offer reliable performance in extreme conditions. Available in various mounting styles including front and rear wall mount, jam nut, and box mount receptacles, they provide versatility for different applications. The connectors come in 9 shell sizes and 52 insert arrangements, accommodating M39029 rear release crimp contacts. Constructed with aluminum shells and offering plating options such as electroless nickel, they ensure durability and corrosion resistance. Certified for RoHS compliance, these connectors meet stringent environmental standards. Perfect for military, aerospace, and industrial use, they guarantee secure and efficient electrical connections.