The MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts housed in a sealed insert. With an operating temperature range of -65 °C to 200 °C, they offer reliable performance in extreme conditions. Available in various shell sizes and insert arrangements, these connectors come in high-strength aluminum shells with options for plating, including cadmium-free finishes. Offering front wall mount, rear wall mount, and jam nut receptacles with RFI grounding plugs, they ensure secure connections. Utilizing M39029 rear release crimp contacts, these connectors are suitable for military and aerospace applications, providing durability and conductivity.