The MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts housed in an insert for reliable electrical connections. These connectors are environmentally sealed, ensuring performance in demanding conditions with an operating temperature range of -65 °C to 200 °C. Available in various shell sizes and insert arrangements, they offer versatility for different applications. Constructed with high-strength aluminum shells and offered in multiple plating options, including cadmium-free finishes, they provide durability and corrosion resistance. The connector family includes front and rear wall mount, as well as jam nut receptacles, with RFI grounding plugs for added functionality. Utilizing M39029 rear release crimp contacts, they ensure secure connections. Suitable for military and industrial use, these connectors meet MIL-DTL-38999 I specifications, making them ideal for critical applications requiring reliable performance in challenging environments.