Introducing MIL-DTL-38999 Series I connectors, designed for harsh environments with up to 128 contacts in a sealed insert. Operating between -65°C and 200°C, these connectors feature front and rear wall mount options, along with jam nut receptacles and RFI grounding plugs. With 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts for reliable connectivity. Constructed with high-strength aluminum shells, they offer various plating options, including gold, electroless nickel, and cadmium-free finishes. Meeting military specifications, these circular connectors ensure durability and performance in demanding applications.