The MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts with environmental sealing for reliable performance. Operating seamlessly in temperatures ranging from -65 °C to 200 °C, they offer versatility in various applications. Available in multiple configurations such as front and rear wall mount, jam nut, and box mount receptacles, these connectors ensure secure connections. With options for straight, RFI grounding, and standard plugs, along with a variety of plating finishes including gold, electroless nickel, and cadmium, they meet diverse needs. Constructed with aluminum shells and utilizing M39029 rear release crimp contacts, these connectors guarantee durability and conductivity. Suitable for military and industrial use, they provide a service rating of I and comply with environmental standards for longevity.