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, making them ideal 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 plating including cadmium-free finishes. With front wall mount, rear wall mount, and jam nut receptacles, they cater to different installation needs. Utilizing M39029 rear release crimp contacts, these connectors ensure secure and reliable connections. Suitable for military and industrial applications, they are durable and robust, meeting stringent performance standards.