The MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts within an environmentally sealed insert. With an operating temperature range of -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. The connector family includes front and rear wall mount receptacles, as well as jam nut receptacles, all meeting stringent military specifications. Incorporating M39029 rear release crimp contacts, they ensure secure connections in applications requiring durability and conductivity. With a mating type of bayonet coupling, they offer easy and efficient installation. Suitable for demanding applications, these connectors provide reliable connectivity in critical environments.