MIL-DTL-38999 Series II connectors are designed for harsh environments, with up to 128 contacts in an insert. These connectors are environmentally sealed and can operate in temperatures ranging from -65 °C to 200 °C. Featuring various mounting options such as front wall mount, rear wall mount, jam nut, and box mount receptacles, they offer versatility in installation. Available in aluminum shells with plating options including cadmium and nickel, these connectors meet military specifications for durability. With gold-plated removable crimp contacts, they ensure reliable conductivity. The straight plug design with bayonet coupling and 66 contacts (size 22D) make them suitable for a wide range of applications. Meeting stringent standards for performance and reliability, these connectors are essential for mission-critical systems in aerospace, defense, and industrial settings.