The MIL-DTL-38999 Series II connectors are designed for rugged environments, featuring up to 128 contacts in an insert and offering reliable performance in extreme temperatures ranging from -65°C to 200°C. These harsh environment connectors come in various mounting styles, including front and rear wall mount, jam nut, and box mount receptacles, providing versatility for different applications. With 52 insert arrangements and M39029 rear release crimp contacts, they ensure secure and efficient connectivity. Constructed with aluminum shells and available in multiple plating options like gold and electroless nickel, they guarantee durability and corrosion resistance. Certified for RoHS compliance, these connectors meet stringent environmental standards, making them ideal for military and industrial use.