The MIL-DTL-38999 Series II connectors offer reliable connectivity in harsh environments with up to 128 contacts and environmental sealing. Designed for durability, they operate smoothly in temperatures ranging from -65 °C to 200 °C. Available in various configurations including front and rear wall mount, jam nut, and box mount receptacles, these connectors ensure secure installations. Featuring 9 shell sizes and 52 insert arrangements with M39029 rear release crimp contacts, they guarantee efficient performance. Crafted from aluminum with plating options such as iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, they meet diverse industrial needs. RoHS certified finishes are also available, making them environmentally conscious choices for critical applications.