MIL-DTL-38999 Series I connectors feature up to 128 contacts within an insert, offering robust environmental sealing and a wide operating temperature range of -65 °C to 200 °C. Designed for harsh environments, they include front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs. With 9 shell sizes and 52 insert arrangements available, these connectors utilize M39029 rear release crimp contacts in various sizes for reliable connectivity. Their high-strength aluminum shells come in different plating options, including light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, with RoHS certified cadmium-free finishes. Perfect for military applications, these connectors ensure durability and performance in demanding conditions.