MIL-DTL-38999 Series I connectors, designed for harsh environments, feature up to 128 contacts in a sealed insert with an operating temperature range of -65°C to 200°C. Available in various mounting options including front and rear wall mount as well as jam nut receptacles, they offer RFI grounding plugs for added versatility. With 9 shell sizes and 52 insert arrangements, these connectors use M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 8. Constructed with high strength aluminum shells, they come in plating options such as light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, with RoHS certified cadmium-free finishes available. Suitable for military and industrial applications, these connectors ensure reliable performance in demanding conditions.