The MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an insert. With a wide operating temperature range (-65 °C to 200 °C) and environmental sealing, these connectors provide reliable performance. Available in various configurations including front wall mount, rear wall mount, and jam nut receptacles, they offer flexibility for different applications. Utilizing M39029 rear release crimp contacts, they ensure secure connections. The high-strength aluminum shells come in different plating options, including gold, electroless nickel, and cadmium-free finishes, meeting RoHS certification. With a bayonet mating type and 500 mating cycles lifespan, these connectors are suitable for military and demanding industrial environments.