The Department of Defense, specifically the Naval Air Systems Command, is seeking to procure Group A hardware kits for the F-35 Lightning II aircraft under a sole source contract with Lockheed Martin Aeronautics Company. The procurement aims to deliver hardware kits necessary for Flight Test Instrumentation (FTI) modifications, which are critical for the ongoing development and operational readiness of the F-35 program. Lockheed Martin is uniquely qualified to fulfill this requirement due to its exclusive design, development, and manufacturing capabilities related to the F-35, making it the only responsible source for this acquisition. Interested parties may submit capability statements to the primary contact, John Liew, at John.Liew@jsf.mil, while subcontracting opportunities may be explored through Emma Stevens at 817-655-8902. Please note that this presolicitation does not guarantee a contract award, and all submissions are voluntary.