The MIL-DTL-38999 Series I connectors offer high-performance connectivity with up to 128 contacts housed in a durable insert. Designed for harsh environments, these connectors are environmentally sealed and can operate in temperatures ranging from -65 °C to 200 °C. Featuring various mounting options like front wall, rear wall, and jam nut receptacles, they ensure versatile installation. The connectors utilize M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 8, accommodating different contact needs. Constructed with high-strength aluminum shells and available in multiple plating options including cadmium-free finishes, they meet stringent military specifications. With a mating type of bayonet coupling and a contact gender of female, these connectors ensure reliable electrical connections in demanding applications.