The MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an insert for versatile connectivity. With an operating temperature range of -65 °C to 200 °C, they are suitable for a wide range of applications. Available in various shell sizes and insert arrangements, these connectors offer flexibility in design. Made with high-strength aluminum shells and offering multiple plating options, including RoHS certified finishes, they ensure durability and reliability. The connectors come in different styles for wall mounting, with options for front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs. Utilizing M39029 rear release crimp contacts, they provide secure connections in demanding environments. With gold contact plating and socket contact style, they offer excellent conductivity and mating reliability, rated for 500 cycles. Their environment-resistant design makes them ideal for military, aerospace, and industrial applications.