MIL-DTL-38999 Series II connectors offer reliable performance in harsh environments with up to 128 contacts sealed for protection. Designed for temperatures ranging from -65 °C to 200 °C, these connectors come in various styles including front and rear wall mount, jam nut, and box mount receptacles. Featuring thin walls and restricted length, they ensure efficient connectivity in military and aerospace applications. With options for straight, RFI grounding, and standard plugs, along with multiple shell sizes and insert arrangements, they provide versatility for various installations. Constructed with aluminum shells and offering plating options such as cadmium and nickel, they meet stringent military specifications. The use of M39029 rear release crimp contacts further enhances their durability, making them suitable for demanding environments. (Word count: 117)