The MIL-DTL-38999 Series II connectors are designed for harsh environments, with up to 128 contacts housed in an insert for optimal connectivity. These receptacles feature various mounting options such as front and rear wall mount, jam nut, and box mount configurations, catering to diverse installation needs. Offering reliable performance in extreme temperatures ranging from -65 °C to 200 °C, these connectors are ideal for military and aerospace applications. Built for durability, they are constructed with aluminum shells and plated with options including electroless nickel and cadmium finishes. Equipped with removable crimp contacts and bayonet coupling, they ensure secure and efficient connections. Meeting stringent military specifications, these connectors guarantee superior quality and performance in demanding operating conditions.