MIL-DTL-38999 Series I connectors feature up to 128 contacts in an insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Available in various shell sizes and insert arrangements, they offer front wall mount, rear wall mount, and jam nut receptacles with RFI grounding plugs. Utilizing M39029 rear release crimp contacts, these connectors are crafted from high-strength aluminum shells. Plating options include light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, with RoHS-certified finishes available. Ideal for military applications, these connectors ensure reliable performance with gold-plated contact pins, meeting stringent durability standards.