MIL-DTL-38999 Series I connectors offer high-performance connectivity, featuring up to 128 contacts housed in a durable insert for reliable operation in harsh environments. Designed for versatility, these connectors come in various configurations, including front wall mount, rear wall mount, and jam nut receptacles, with RFI grounding plugs. With a wide operating temperature range of -65 °C to 200 °C, they are suitable for demanding applications. The connectors utilize M39029 rear-release crimp contacts in different sizes, ensuring secure and efficient connections. Constructed with high-strength aluminum shells and available in various plating options like electroless nickel and cadmium finishes, they provide excellent durability. Meeting MIL-DTL-38999 I military specifications, these circular receptacles are ideal for back panel, box mounting applications, offering reliable performance in environments requiring rugged and conductive connectors.