MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert. These connectors are environmentally sealed and can operate in temperatures ranging from -65 °C to 200 °C. Available in various mounting options, including front wall mount, rear wall mount, jam nut, rear box mount, and front box mount receptacles, they offer versatility for different applications. With 52 insert arrangements and M39029 rear release crimp contacts, these connectors ensure reliable connectivity. Constructed with aluminum shells and plated with options like electroless nickel and cadmium finishes, they meet stringent military specifications. Suitable for use in demanding conditions, these connectors are ideal for aerospace, defense, and industrial applications.