MIL-DTL-38999 Series I connectors are rugged and reliable, designed for harsh environments. With up to 128 contacts housed in an insert, they offer secure connectivity. These connectors are environmentally sealed, ensuring optimal performance in a wide range of conditions, with an operating temperature spanning from -65 °C to 200 °C. Featuring various mounting options such as front wall mount, rear wall mount, and jam nut receptacles, they cater to diverse installation needs. The connectors utilize M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 8, including coax and twinax variants. Constructed with high-strength aluminum shells and available in different plating options like electroless nickel and cadmium finishes, they offer durability and corrosion resistance. Meeting MIL-DTL-38999 I military specifications, these circular connectors are ideal for demanding applications requiring reliable and efficient connectivity.