MIL-DTL-38999 Series I connectors are designed for harsh environments, offering up to 128 contacts in a sealed insert. With an operating temperature range of -65 °C to 200 °C, these connectors are reliable in extreme conditions. Featuring front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs, they provide versatile connectivity options. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts in various sizes. Constructed with high-strength aluminum shells, they come with a range of plating options, including cadmium-free finishes for environmental compliance. These connectors, meeting MIL-DTL-38999 I specifications, are ideal for aerospace, military, and industrial applications requiring rugged performance.