The MIL-DTL-38999 Series II connectors feature up to 128 contacts in an insert, designed for harsh environments with operating temperatures ranging from -65 °C to 200 °C. Available in various mounting styles like front and rear wall mount, jam nut, and box mount receptacles, they offer versatility for different applications. With 52 insert arrangements and M39029 rear release crimp contacts, users can customize their connectivity needs. These connectors, made of aluminum shells with options for plating finishes like cadmium and electroless nickel, ensure durability and reliability. Meeting military specification MIL-DTL-38999 II, they guarantee performance in demanding environments, making them ideal for aerospace, defense, and industrial applications.