MIL-DTL-38999 Series I connectors offer high-performance connectivity in harsh environments, with up to 128 contacts housed in a rugged insert. Designed for durability, these connectors are environmentally sealed and can operate reliably in temperatures ranging from -65°C to 200°C. Featuring front and rear wall mount options, as well as jam nut receptacles, they provide versatile installation choices. With a selection of 52 insert arrangements and M39029 rear release crimp contacts in various sizes, they ensure secure and efficient connections. Constructed with high-strength aluminum shells and available in different plating options including cadmium-free finishes, these connectors meet stringent military specifications for performance and reliability. Ideal for aerospace, defense, and other demanding applications, they offer exceptional durability and conductivity, with a mating life of 500 cycles.