MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring front wall mount, rear wall mount, and jam nut receptacles with RFI grounding plugs. With up to 128 contacts in an insert, they offer high-density connectivity. Operating in temperatures ranging from -65 °C to 200 °C, these connectors are environmentally sealed for reliable performance. 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, they come in various plating options, including cadmium-free finishes for RoHS compliance. Perfect for military and aerospace applications, these connectors ensure durability and conductivity in demanding conditions.