MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in a securely sealed insert. With a wide operating temperature range from -65 °C to 200 °C, these connectors offer reliable performance in extreme conditions. Available in various configurations including front and rear wall mount, jam nut, and box mount receptacles, they provide versatile connectivity options. The connectors come in aluminum shells with plating choices such as gold, electroless nickel, and cadmium-free finishes, ensuring durability and compliance with RoHS standards. Ideal for military and aerospace applications, these connectors guarantee high conductivity and ingress protection, making them essential components for demanding environments.