The 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 of -65 °C to 200 °C. Available in various shell sizes and insert arrangements, they offer versatility in applications. The connectors come in high-strength aluminum shells with options for plating, including cadmium-free finishes. With front wall mount, rear wall mount, and jam nut receptacles, they provide flexibility in installation. Utilizing M39029 rear release crimp contacts, these connectors ensure secure connections. Suitable for military and industrial use, they meet stringent performance standards.