MIL-DTL-38999 Series I connectors feature up to 128 contacts housed in an environmentally sealed insert, designed for harsh environments with an operating temperature range from -65 °C to 200 °C. Available in various shell sizes and insert arrangements, they offer front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs. Constructed with high-strength aluminum shells and offering multiple plating options, including RoHS certified finishes, these connectors ensure reliable performance in demanding applications. The connector family uses M39029 rear release crimp contacts for secure connectivity. Designed to MIL-DTL-38999 I military specification standards, they are ideal for use in aerospace, defense, and other rugged environments.