The MIL-DTL-38999 Series II connectors offer high performance in harsh environments with up to 128 contacts contained in an insert. These environmentally sealed connectors have an operating temperature range of -65 °C to 200 °C. Available in various configurations, including front and rear wall mount, jam nut, and box mount receptacles, they ensure secure connectivity. Featuring straight, RFI grounding, and standard plugs with a 90-degree cable clamp, these connectors cater to diverse needs. With 9 shell sizes and 52 insert arrangements utilizing M39029 rear release crimp contacts, they provide versatility in applications. Crafted from aluminum with plating options like electroless nickel and cadmium finishes, they offer durability and reliability. Suitable for military and industrial use, these connectors meet stringent performance standards for rugged environments.