MIL-DTL-38999 Series I connectors offer exceptional performance in harsh environments, with up to 128 contacts sealed for environmental protection. Operating between -65 °C and 200 °C, these connectors feature front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts in various sizes, ensuring reliable connectivity. Constructed with high-strength aluminum shells, they come in a range of plating options, including cadmium-free finishes like electroless nickel. Meeting stringent military specifications, these connectors are ideal for applications where durability and performance are paramount.