MIL-DTL-38999 Series II connectors, designed for harsh environments, feature 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, they offer durability and versatility. Available in 9 shell sizes and 52 insert arrangements, these connectors use M39029 rear release crimp contacts in various sizes. Constructed with aluminum shells, they come with plating options like light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, including RoHS certified finishes. Ideal for military and industrial applications, these connectors ensure reliable performance in demanding conditions, meeting MIL-DTL-38999 II standards.