The MIL-DTL-38999 Series I connectors feature up to 128 contacts, designed for harsh environments with an operating temperature range from -65 °C to 200 °C. These connectors come in various configurations including front wall mount, rear wall mount, and jam nut receptacles, all offering RFI grounding plugs. With 9 shell sizes and 52 insert arrangements available, they utilize M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 8, suitable for coax and twinax applications. Constructed with high-strength aluminum shells, they offer plating options like iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, with RoHS certified cadmium-free finishes. The MS27467 connectors are specified for military use, ensuring reliability in demanding conditions, with a straight plug design and gold contact plating, guaranteeing optimal conductivity. Perfect for applications requiring secure and resilient electrical connections.