MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an insert with front wall mount, rear wall mount, and jam nut receptacles. Operating in temperatures ranging from -65°C to 200°C, they offer reliable performance in extreme conditions. Utilizing M39029 rear release crimp contacts, these connectors come in 9 shell sizes and 52 insert arrangements, accommodating various applications. Constructed with high-strength aluminum shells and available in different plating options including electroless nickel and cadmium finishes, they ensure durability and corrosion resistance. Compliant with RoHS regulations, these connectors are ideal for military and industrial use.