MIL-DTL-38999 Series I connectors boast up to 128 contacts in an environmentally sealed insert, ensuring reliability in harsh conditions with an operating temperature range of -65 °C to 200 °C. Featuring front wall mount, rear wall mount, and jam nut receptacles with RFI grounding plugs, this connector family offers versatility in connectivity. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts, accommodating various sizes including coax and twinax. Crafted from high-strength aluminum, these connectors come in a range of plating options such as electroless nickel and cadmium finishes, with RoHS certified cadmium-free alternatives. Perfect for military and industrial applications, they provide secure and durable electrical connections, meeting stringent performance standards.