MIL-DTL-38999 Series I connectors offer high-performance connectivity in harsh environments, featuring up to 128 contacts within a sealed insert. Designed for durability, they can operate in temperatures ranging from -65 °C to 200 °C. This connector family includes front and rear wall mount and jam nut receptacles, along with RFI grounding plugs, providing versatile installation options. With nine shell sizes and 52 insert arrangements available, they accommodate various contact configurations, including M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 8. Constructed with rugged high-strength aluminum shells, these connectors offer multiple plating options such as electroless nickel, olive drab cadmium, and black anodized aluminum, ensuring reliable performance in diverse applications. The connectors are RoHS compliant, meeting environmental standards while delivering exceptional conductivity and ingress protection for critical electrical systems.