The 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 of -65°C to 200°C, they offer reliable performance in extreme conditions. Available in various mounting options including front and rear wall mount, jam nut, and box mount receptacles, these connectors are versatile for different applications. The plugs come in straight, RFI grounding, and standard configurations, with 9 shell sizes and 52 insert arrangements to choose from. Utilizing M39029 rear release crimp contacts, they ensure secure connections. Constructed with aluminum shells and offering multiple plating options like cadmium and nickel, these connectors are durable and corrosion-resistant. Suitable for military and industrial use, they meet stringent performance standards.