MIL-DTL-38999 Series I connectors offer robust performance in harsh environments, featuring up to 128 contacts in a sealed insert. With an operating temperature range of -65 °C to 200 °C, these connectors are suitable for demanding applications. Available in various configurations such as front and rear wall mount, jam nut receptacles, and RFI grounding plugs, they provide versatility in connectivity solutions. Compliant with military specification MIL-DTL-38999 I, these circular connectors boast high-strength aluminum shells with options for different plating finishes including gold, electroless nickel, and cadmium-free coatings. The use of M39029 rear release crimp contacts ensures reliable connections, with a mating type of bayonet for secure engagement. Designed for longevity with a mating life of 500 cycles, these connectors are ideal for aerospace, defense, and industrial applications requiring rugged and reliable performance in challenging environments.