MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts and environmental sealing. With an operating temperature range of -65 °C to 200 °C, they offer reliable performance in extreme conditions. The connector family includes front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs, providing versatility for various applications. Available in 9 shell sizes and 52 insert arrangements, these connectors use M39029 rear release crimp contacts in different sizes. Constructed with high-strength aluminum shells, they come with a range of plating options, including cadmium-free finishes for RoHS compliance. Suitable for military and industrial use, these connectors ensure secure and durable electrical connections in demanding environments.