The MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert and offering front and rear wall mount, jam nut, and box mount receptacles. Operating between -65 °C and 200 °C, these connectors are environmentally sealed and ideal for demanding applications. With 52 insert arrangements and various plating options including gold and electroless nickel, they ensure reliable performance in diverse settings. These connectors, made of aluminum, meet military specification MIL-DTL-38999 II and are perfect for use in situations requiring rugged and durable connectivity.