MIL-DTL-38999 Series I connectors, designed for harsh environments, feature up to 128 contacts in an insert with environmental sealing. Operating temperature ranges from -65°C to 200°C. This connector family includes front wall mount, rear wall mount, and jam nut receptacles, with RFI grounding plugs. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts in various sizes. Constructed with high-strength aluminum shells, they offer plating options like light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, with RoHS certified cadmium-free finishes. Ideal for demanding applications, these connectors ensure reliable performance in challenging conditions.