This is a procurement for six aluminum in-flight refueling receptacle assemblies (NSN 1680-01-057-3391) for the F-16 aircraft, with delivery of all units required by November 19, 2027. The government intends to solicit and negotiate with only one or a limited number of sources, specifically noting Parker-Hannifin Corporation as a qualified source. The solicitation will be available for download only at www.Sam.gov, and proposals received within 45 days of the synopsis publication will be considered. An ombudsman is appointed to hear concerns from offerors.