MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert with front wall mount, rear wall mount, jam nut, rear box mount, and front box mount receptacles. Operating between -65 °C and 200 °C, these connectors offer reliability in extreme conditions. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts in various sizes. Made of aluminum, they come in plating options like light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, with RoHS certified cadmium-free finishes. Ideal for military applications, the MIL-DTL-38999 II connectors ensure durability and performance in demanding situations.