The MIL-DTL-38999 Series II connectors are designed for harsh environments, offering up to 128 contacts in an insert for reliable connectivity. With environmental sealing and a wide operating temperature range from -65°C to 200°C, these connectors are suited for demanding applications. Available in various mounting styles like front and rear wall mount, jam nut, and box mount receptacles, they provide flexibility for installation. Featuring aluminum shells with plating options including cadmium and nickel, they ensure durability and corrosion resistance. Compliant with military specification MIL-DTL-38999 II, these circular connectors are ideal for aerospace, defense, and industrial use.