The MIL-DTL-38999 Series I connectors offer high-performance connectivity with up to 128 contacts in an insert. Built for harsh environments, they are environmentally sealed and can operate in temperatures ranging from -65 °C to 200 °C. Featuring various receptacle options like front wall mount, rear wall mount, and jam nut, these connectors ensure secure installations. With 52 insert arrangements and M39029 rear release crimp contacts, they provide versatility in wiring configurations. Crafted in high-strength aluminum shells with plating options including gold, electroless nickel, and cadmium finishes, they guarantee durability and reliable performance. Meeting stringent military specifications, these circular connectors are ideal for applications requiring rugged and reliable connections.