MIL-DTL-38999 Series II connectors are designed for harsh environments, offering up to 128 contacts in an environmentally sealed insert. With an operating temperature range from -65 °C to 200 °C, these connectors ensure reliable performance in extreme conditions. Available in various mounting options such as front and rear wall mount, jam nut, and box mount receptacles, they provide flexibility for different applications. The connectors feature thin walls and restricted lengths, with options for straight, RFI grounding, and 90-degree cable clamp plugs. Utilizing M39029 rear release crimp contacts in multiple sizes, they offer secure and efficient connections. Constructed with aluminum shells and various plating options including cadmium-free finishes, they meet stringent military specifications for durability and reliability. Suitable for use in aerospace, defense, and industrial applications, these connectors provide high-quality electrical connectivity in demanding environments.