MIL-DTL-38999 Series I connectors feature up to 128 contacts housed in an insert, providing robust environmental sealing and an impressive operating temperature range from -65 °C to 200 °C. This connector family includes 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 utilize M39029 rear release crimp contacts in various sizes, ensuring versatility in connectivity. Constructed with high-strength aluminum shells, these connectors offer multiple plating options, including cadmium-free finishes. Meeting stringent military specifications, they are ideal for harsh environments, guaranteeing reliable performance in demanding applications.