Amphenol Aerospace Series Five Black Zinc-Nickel Circular Connectors are designed for the military and aerospace markets. These next-generation connectors offer weight and space savings while exceeding the performance of D38999. Amphenol Aerospace Series Five Black Zinc-Nickel Circular Connectors use 38999-qualified components and are rated at higher voltages, providing designers with an optimal solution. Applications include military / defense, aerospace, harsh environments, and general duty.