MIL-DTL-38999 Series I connectors offer exceptional performance in harsh environments with up to 128 contacts in an insert, ensuring reliable connectivity. These circular connectors feature front wall mount, rear wall mount, and jam nut receptacles with RFI grounding plugs, suitable for military and industrial applications. Constructed with high-strength aluminum shells and available in various plating options, including RoHS-certified finishes, they guarantee durability and environmental resilience. With a wide range of shell sizes and insert arrangements, along with M39029 rear release crimp contacts, they provide versatility for different connection needs. Operating in temperatures ranging from -65°C to 200°C, these connectors meet stringent performance standards for demanding environments.