MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an insert. These connectors are front wall mount, rear wall mount, and jam nut receptacles with RFI grounding plugs. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts in various sizes. Constructed with high-strength aluminum shells and offered in multiple plating options, including cadmium-free finishes, these connectors ensure reliable performance in extreme conditions. With an operating temperature range from -65 °C to 200 °C, they are ideal for military and aerospace applications.