MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an environmentally sealed insert. With a wide operating temperature range of -65°C to 200°C, these connectors offer reliable performance in extreme conditions. Available in various mounting options including front wall, rear wall, 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 in sizes 22D, 22M, 22, 20, 16, and 12. Constructed with durable aluminum shells and offering multiple plating options such as cadmium and nickel, they ensure corrosion resistance. These connectors, meeting MIL-DTL-38999 II specifications, are essential for demanding military and industrial environments.