The MIL-DTL-38999 Series I connectors offer high-performance connectivity with up to 128 contacts in a rugged insert design. These environmentally sealed connectors feature a wide operating temperature range from -65 °C to 200 °C, making them ideal for harsh environments. Available in various shell sizes and insert arrangements, they accommodate M39029 rear release crimp contacts for secure connections. The connectors, made of high-strength aluminum, come in multiple plating options including cadmium-free finishes for RoHS compliance. With options for front wall mount, rear wall mount, and jam nut receptacles, they provide versatile installation solutions. Designed to meet military specifications, these connectors ensure reliable performance in demanding applications.