MIL-DTL-38999 Series I connectors offer high-performance connectivity with up to 128 contacts in a rugged insert. Designed for harsh environments, they feature front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs. With 9 shell sizes and 52 insert arrangements available, these connectors utilize M39029 rear release crimp contacts for secure connections. The high strength aluminum shells come in various plating options, including cadmium-free finishes for RoHS compliance. Operating temperatures ranging from -65 °C to 200 °C make them suitable for a wide range of applications, ensuring reliable performance in demanding conditions.