MIL-DTL-38999 Series I connectors offer reliable performance in harsh environments, featuring up to 128 contacts housed in an environmentally sealed insert. With an operating temperature range of -65°C to 200°C, these front wall mount, rear wall mount, and jam nut receptacles are ideal for a variety of applications. Utilizing M39029 rear release crimp contacts in various sizes, these connectors come in 9 shell sizes and 52 insert arrangements. Constructed with high-strength aluminum shells and available in different plating options, including RoHS certified finishes, they ensure durability and compliance. The Bayonet coupling and gold contact plating guarantee secure connections, while the Electroless Nickel and Cadmium Olive Drab coating offer enhanced protection. Perfect for military and industrial use, these connectors provide reliable performance in demanding conditions.