MIL-DTL-38999 Series I connectors offer high-performance connectivity for demanding environments. With up to 128 contacts in a sealed insert, these connectors ensure reliable operation in extreme conditions, with an impressive operating temperature range from -65 °C to 200 °C. Featuring front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs, they provide versatile options for various applications. Available in 9 shell sizes and 52 insert arrangements, these connectors utilize M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 8, including coax and twinax configurations. Constructed with high-strength aluminum shells and offering a choice of plating options, such as cadmium and nickel finishes, they meet stringent military specifications for performance and durability. With RoHS compliant versions available, these connectors are ideal for critical aerospace, defense, and industrial applications.