MIL-DTL-38999 Series II connectors offer a robust solution for harsh environments, featuring up to 128 contacts in a sealed insert. With an operating temperature range from -65 °C to 200 °C, these connectors are designed for durability. Available in various mounting styles like front and rear wall mount, jam nut, and box mount receptacles, they cater to diverse connectivity needs. The connectors, crafted from aluminum, come in 9 shell sizes and 52 insert arrangements, utilizing M39029 rear release crimp contacts. Offering plating options including cadmium-free finishes, such as electroless nickel and black anodized aluminum, they meet RoHS compliance standards. Suitable for military and industrial applications, these connectors ensure reliable performance in demanding conditions.