The MIL-DTL-38999 Series I connectors boast up to 128 contacts housed in a durable insert, offering robust environmental sealing and a wide operating temperature range of -65 °C to 200 °C. Designed for harsh environments, this connector family includes front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs. With 9 shell sizes and 52 insert arrangements available, they feature M39029 rear release crimp contacts in various sizes. Crafted from high-strength aluminum, the connectors come with a choice of plating options, including cadmium-free finishes for RoHS compliance. Perfect for military specifications, these circular connectors ensure reliable performance in demanding applications.