MIL-DTL-38999 Series I connectors are rugged and reliable, designed for harsh environments with up to 128 contacts. Featuring front wall mount, rear wall mount, and jam nut receptacles, they offer secure connectivity in demanding applications. These environmentally sealed connectors have a wide operating temperature range of -65 °C to 200 °C, making them suitable for use in extreme conditions. Compliant with military specifications, they ensure high performance and durability. Available in various shell sizes and insert arrangements, they accommodate different contact types, including rear release crimp contacts. With options for RoHS certified finishes, such as cadmium-free platings, they meet environmental standards. The high-strength aluminum shells provide robust protection, while the gold-plated contacts ensure reliable conductivity. Suitable for box and through bulkhead mounting, these connectors are ideal for aerospace, defense, and industrial applications where reliable signal transmission is critical.