The MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert with front and rear wall mount options, jam nut, and box mount receptacles. Operating in temperatures ranging from -65°C to 200°C, these connectors offer durability and reliability. Available in aluminum shells with various plating options, including cadmium-free finishes, they meet military specification standards for performance and longevity. With a wide range of shell sizes and insert arrangements, they accommodate diverse connectivity needs, making them ideal for demanding applications in aerospace, defense, and industrial settings.