The 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. With 9 shell sizes and 52 insert arrangements available, these connectors utilize M39029 rear release crimp contacts in various sizes. Constructed with high strength aluminum shells, they offer a choice of plating options, including cadmium-free finishes. Suitable for military and industrial applications, the MIL-DTL-38999 I connectors provide reliable performance in demanding conditions.