The MIL-DTL-38999 Series II connectors are built to withstand harsh environments, with up to 128 contacts sealed to protect against extreme temperatures ranging from -65°C to 200°C. Available in various configurations such as front and rear wall mounts, jam nut, and box mounts, these connectors ensure reliable performance in demanding applications. Featuring aluminum shells with plating options including gold and electroless nickel, they offer superior conductivity and corrosion resistance. With MIL-DTL-38999 II compliance, these circular receptacles are designed for military and aerospace use, boasting rugged construction and 500 mating cycles durability. Perfect for applications requiring reliable signal transmission in challenging environments.