The MIL-DTL-38999 Series II connectors feature up to 128 contacts within an environmentally sealed insert, designed for harsh environments with an operating temperature range of -65°C to 200°C. Available in various mounting options like 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 plating options such as cadmium and nickel for enhanced durability. With RoHS certified finishes, they ensure reliable performance in demanding applications, making them ideal for military and aerospace use.