MIL-DTL-38999 Series I connectors offer durability and reliability in harsh environments, featuring up to 128 contacts housed in a sealed insert. Operating seamlessly in temperatures ranging from -65 °C to 200 °C, these connectors come in various configurations including front and rear wall mount, as well as jam nut receptacles. With 9 shell sizes and 52 insert arrangements available, they accommodate different needs with M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 8 for coax and twinax applications. Crafted from high-strength aluminum, these connectors come with multiple plating options such as light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, with RoHS certified cadmium-free finishes ensuring environmental compliance. Perfect for military and industrial use, MIL-DTL-38999 Series I connectors are designed for optimal performance and longevity in demanding settings.