MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an insert for robust connectivity. With environmental sealing and a wide operating temperature range of -65 °C to 200 °C, these connectors ensure reliable performance in demanding conditions. The connector family includes front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs, offering versatility in installation. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts for secure connections. Constructed with high-strength aluminum shells and various plating options, such as electroless nickel and cadmium-free finishes, these connectors meet stringent military specifications for durability. Perfect for applications requiring rugged and dependable electrical connections, MIL-DTL-38999 Series I connectors provide optimal performance in extreme environments.