MIL-DTL-38999 Series II connectors, designed for rugged environments, feature up to 128 contacts in an insert with front and rear wall mount options, along with jam nut and box mount receptacles. Operating in temperatures ranging from -65 °C to 200 °C, these connectors offer reliability in extreme conditions. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts in various sizes. Constructed with aluminum shells, they come with plating options such as electroless nickel and cadmium finishes. RoHS certified versions are also available, making them suitable for diverse applications in demanding environments.