MIL-DTL-38999 Series I connectors offer high-performance connectivity with up to 128 contacts in a robust insert. Designed for harsh environments, these connectors are environmentally sealed and operate reliably 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, they ensure secure installations. The connector family, compliant with military specification MIL-DTL-38999 I, boasts 52 insert arrangements and utilizes M39029 rear release crimp contacts for efficient connections. Constructed with high-strength aluminum shells and available in different plating options such as gold, electroless nickel, and cadmium-free finishes, they guarantee durability and conductivity. With a bayonet coupling mechanism, these connectors offer easy mating and 1500-cycle contact life. Suitable for diverse applications requiring reliability in demanding environments, they provide excellent performance in aerospace, defense, and industrial settings.