MIL-DTL-38999 Series I connectors feature up to 128 contacts in an environmentally sealed insert, with a wide operating temperature range of -65 °C to 200 °C. Designed for harsh environments, they come in various shell sizes and insert arrangements, accommodating M39029 rear release crimp contacts. These connectors, with front wall mount, rear wall mount, and jam nut receptacles, also include RFI grounding plugs. 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 available. Suitable for military applications, these connectors ensure reliable connectivity in demanding conditions.