The MIL-DTL-38999 Series I connectors boast up to 128 contacts within an insert, designed for harsh environments with a wide operating temperature range of -65 °C to 200 °C. Featuring front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs, they offer versatility in installation. With 52 insert arrangements and M39029 rear release crimp contacts in various sizes, including coax and twinax, these connectors ensure reliable connectivity. Constructed with high-strength aluminum shells and available in different plating options, from cadmium to electroless nickel, they guarantee durability. RoHS certified finishes are also available for environmental compliance. Ideal for military and industrial applications, these connectors are essential for maintaining secure and efficient electrical connections in demanding settings.