MIL-DTL-38999 Series I connectors offer reliable connectivity in harsh environments, featuring up to 128 contacts in an environmentally sealed insert. With an operating temperature range of -65 °C to 200 °C, these connectors come in various mount types including front wall, rear wall, and jam nut receptacles, along with RFI grounding plugs. Designed for durability, they are constructed with high strength aluminum shells and offered in different plating options such as cadmium and nickel. RoHS compliant finishes are also available. The connectors use M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 8, with gold plating for enhanced conductivity. Suitable for military and industrial applications, they ensure reliable performance with 500 mating cycles and compliance with MIL-DTL-38999 I specifications.