The MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an environmentally sealed insert. With an operating temperature range of -65 °C to 200 °C, these connectors offer reliable performance in a variety of conditions. Available in 9 shell sizes and 52 insert arrangements, they are suited for diverse applications. The connectors come in high-strength aluminum shells with various plating options, including cadmium-free finishes for RoHS compliance. Offering front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs, they provide versatility in installation. Utilizing M39029 rear release crimp contacts, these connectors ensure secure and efficient connections. With features like gold contact plating, Electroless Nickel, and Cadmium Olive Drab coatings, they guarantee excellent conductivity and durability. The MIL-DTL-38999 Series I connectors are ideal for military, aerospace, and industrial applications where rugged performance is essential.