MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an environmentally sealed insert. With a wide operating temperature range of -65 °C to 200 °C, these connectors are suitable for rugged applications. Available in various shell sizes and insert arrangements, they offer versatility in design. The connectors come in high strength aluminum shells with options for different plating finishes, including RoHS certified cadmium-free coatings. Offering reliable performance, they are ideal for military and aerospace applications. With front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs, they provide secure connectivity in demanding environments. Utilizing M39029 rear release crimp contacts, these connectors ensure efficient and durable electrical connections.