This document outlines a justification for a sole-source procurement of ten flexible shafts, identified by part number 0-112-130-6000, for the U.S. Coast Guard. It cites the necessity of these specific components for critical operational functionality, particularly in transferring power from the engine to the propeller. The document asserts that Coast Powertrain Ltd. is the only supplier capable of providing these parts due to their possession of proprietary technical data required for correct manufacturing. Efforts were made to contact other potential suppliers, but none could provide the necessary OEM specifications. The justification complies with the Federal Acquisition Regulation (FAR) for limiting competition, emphasizing the unique characteristics of the flexible shaft that prevent alternative sourcing. Future actions involve continued market research to identify other vendors capable of meeting the Coast Guard's requirements. The necessity for these specific parts highlights the intersection of national security needs with procurement practices.