MIL-DTL-38999 Series II connectors are engineered for rugged environments, boasting up to 128 contacts within an insert for versatile connectivity. With a wide operating temperature range of -65 °C to 200 °C, these connectors offer reliable performance in extreme conditions. Featuring various mounting options such as front wall, rear wall, jam nut, and box mount receptacles, they cater to diverse installation needs. The connectors, available in 9 shell sizes and 52 insert arrangements, utilize M39029 rear release crimp contacts for secure connections. Crafted from aluminum, they come in plating options including cadmium and electroless nickel for enhanced durability. Designed to meet military specification MIL-DTL-38999 II, these connectors ensure high-performance and reliability in demanding applications.