The MIL-DTL-38999 Series I connectors feature up to 128 contacts in an insert, designed for harsh environments with operating temperatures ranging from -65°C to 200°C. Available in various configurations including front wall mount, rear wall mount, and jam nut receptacles, they offer RFI grounding plugs for enhanced performance. With 9 shell sizes and 52 insert arrangements, these connectors utilize M39029 rear release crimp contacts, ensuring reliable connectivity. Constructed with high strength aluminum shells and offering plating options such as cadmium-free finishes, they meet stringent military specifications for durability. Suitable for applications requiring secure and high-performance connections, these connectors are ideal for use in demanding environments.