MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an insert. These connectors are environmentally sealed with an operating temperature range from -65 °C to 200 °C. Available in various shell sizes and insert arrangements, they utilize M39029 rear release crimp contacts for reliable connections. With options for front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs, they offer versatility in installation. The high-strength aluminum shells come in different plating options, including cadmium-free finishes, ensuring durability and compliance with RoHS standards. Suitable for military and industrial applications, these connectors provide secure and efficient electrical connections in demanding environments.