MIL-DTL-38999 Series I connectors offer reliable performance in harsh environments with up to 128 contacts in an insert. Designed for demanding applications, they are environmentally sealed and can operate in temperatures ranging from -65 °C to 200 °C. Featuring various mounting options including front and rear wall mount as well as jam nut receptacles, these connectors ensure secure connections. The family includes 52 insert arrangements and utilizes M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 8. Constructed with high strength aluminum shells, they come in a range of plating options such as light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, catering to diverse needs. With RoHS certified cadmium-free finishes available, these connectors provide both performance and compliance assurance for critical applications.