MIL-DTL-38999 Series I connectors feature up to 128 contacts in an environmentally sealed insert, with a wide operating temperature range of -65 °C to 200 °C. This harsh environment connector family includes front wall mount, rear wall mount, and jam nut receptacles, along 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, these connectors offer plating options such as cadmium and nickel, with RoHS certified finishes. Designed for military specifications, they ensure reliable performance in demanding applications.