MIL-DTL-38999 Series I connectors offer robust connectivity with up to 128 contacts in an environmentally sealed insert. Designed for harsh environments, they operate reliably in temperatures ranging from -65 °C to 200 °C. Featuring various mounting options such as front wall, rear wall, and jam nut receptacles, as well as RFI grounding plugs, these connectors ensure secure installations. With 52 insert arrangements and M39029 rear release crimp contacts in multiple sizes, including coax and twinax, they provide versatile solutions for diverse applications. Constructed with high-strength aluminum shells and available in different plating options, including cadmium-free finishes, these connectors meet stringent requirements for reliability and performance. Suitable for military and industrial use, they offer dependable connectivity in demanding environments.