The MIL-DTL-38999 Series I connectors are ruggedly designed for harsh environments, featuring up to 128 contacts in an insert. With an operating temperature range spanning from -65 °C to 200 °C, they offer reliable performance in extreme conditions. Available in various shell sizes and insert arrangements, these connectors come in high-strength aluminum shells with options for plating, including cadmium-free finishes. They are environmentally sealed and compatible with M39029 rear-release crimp contacts, ensuring secure and efficient connections. The series includes front wall mount, rear wall mount, and jam nut receptacles, all meeting military specification standards for durability and reliability. Whether for military, aerospace, or industrial applications, these connectors provide the connectivity needed in demanding environments.