MIL-DTL-38999 Series I connectors feature up to 128 contacts within an environmentally sealed insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. This connector family includes front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs, offering versatility in installation. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts in various sizes, ensuring secure connections. Constructed with high-strength aluminum shells, these connectors come in a range of plating options such as cadmium and nickel, meeting diverse industrial requirements. RoHS certified finishes are also available for environmentally conscious applications, making them suitable for a wide range of scenarios.