The MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an environmentally sealed insert. With an operating temperature range of -65 °C to 200 °C, they offer reliable performance in extreme conditions. Available in various mounting options such as front and rear wall mount, jam nut, and box mount receptacles, these connectors ensure versatile installation. Constructed with aluminum shells and offering plating options like electroless nickel and cadmium finishes, they meet stringent military specifications. Designed for durability, they feature removable crimp contacts and a bayonet coupling for secure mating. Suitable for applications requiring high reliability, these connectors are ideal for use in aerospace, defense, and industrial settings.