MIL-DTL-38999 Series I connectors offer robust connectivity with up to 128 contacts housed in a sealed insert, designed for harsh environments. Featuring front and rear wall mount options, as well as jam nut receptacles, these connectors are versatile in their applications. Built to withstand extreme temperatures ranging from -65 °C to 200 °C, they ensure reliable performance in demanding conditions. The connectors, compliant with military specifications, come in various shell sizes and insert arrangements, accommodating different contact types including M39029 rear release crimp contacts. Constructed with high-strength aluminum shells and plated with options like electroless nickel and cadmium finishes, they prioritize durability and corrosion resistance. With RoHS-certified cadmium-free variants available, these connectors guarantee both performance and environmental compliance.