MIL-DTL-38999 Series I connectors offer reliable connectivity with up to 128 contacts in an insert, ideal for harsh environments. Featuring front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs, they ensure secure installations. With a wide operating temperature range from -65 °C to 200 °C, these connectors are suitable for diverse applications. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts for efficient connectivity. Constructed with high strength aluminum shells and various plating options such as electroless nickel, they provide durability and corrosion resistance. Meeting military specifications, these connectors are essential for demanding environments requiring rugged and reliable electrical connections.