The MIL-DTL-38999 Series II connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with an operating temperature range of -65°C to 200°C. Available in various configurations including front and rear wall mount, jam nut, and box mount receptacles, they offer versatility in installation. These connectors, compliant with military specification MIL-DTL-38999 II, come in aluminum shells with options for plating such as gold and electroless nickel, ensuring reliable conductivity. With RoHS certified finishes available, they meet environmental standards while providing durability with a service rating of I. Suitable for demanding applications, these connectors guarantee high performance in aerospace, military, and industrial settings.