The Department of Defense, through the NAVSUP Weapon Systems Support office, is seeking to procure eight units of the Spindle Assembly, part number 70102-28100-047, on a sole source basis from Sikorsky. This procurement is critical for maintaining the operational capabilities of helicopter rotor blades and drive mechanisms, as the Government does not possess the necessary data or rights to source these components from alternative suppliers. Interested parties are encouraged to submit capability statements or proposals within 45 days of this notice, with all communications directed to Kate N. Schalck at kate.n.schalck.civ@us.navy.mil. This opportunity is not set aside for small businesses, and the procurement will follow the guidelines outlined in FAR Part 15.