MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert. These connectors are environmentally sealed and can operate in temperatures ranging from -65 °C to 200 °C. Available in various mounting options such as front wall mount, rear wall mount, jam nut, rear box mount, and front box mount receptacles, they offer flexibility in installation. With 52 insert arrangements and M39029 rear release crimp contacts, they ensure reliable connectivity. Constructed with aluminum shells and plating options including electroless nickel and cadmium finishes, these connectors guarantee durability. The bayonet coupling mechanism and gold-plated contact pins ensure secure mating and high conductivity. Suitable for military and industrial applications, they meet stringent performance standards.