MIL-DTL-38999 Series I connectors offer high-performance connectivity with up to 128 contacts in an environmentally sealed insert. Designed for harsh environments, these connectors 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, they cater to diverse application needs. Utilizing M39029 rear release crimp contacts in various sizes, including coax and twinax, they ensure reliable signal transmission. Constructed with high-strength aluminum shells and offering plating options like electroless nickel and cadmium finishes, these connectors guarantee durability. Operating between -65 °C and 200 °C, they are suitable for a wide range of industrial and military applications.