MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in a sealed insert. With an operating temperature range from -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 different plating finishes, including cadmium-free choices. Offering versatility, they include front wall mount, rear wall mount, and jam nut receptacles, with RFI grounding plugs. Utilizing M39029 rear release crimp contacts, these connectors ensure secure connections. Suitable for military and industrial applications, they provide durability and conductivity, meeting stringent standards for environmental resistance.