This is a sole-source contract for a part (NSN 7R-1680-016281388-QE) that requires engineering source approval from the design control activity. Only previously approved sources may supply the item, as they retain essential data rights or manufacturing knowledge not economically available to the government. New sources must qualify through NAVSUP WSS procedures, but the approval timeline cannot delay the award given fleet support needs. The government intends to negotiate with only one source under FAR 6.302-1, but all responsible parties may submit capability statements or proposals. Interested firms must provide all required source approval data per the relevant NAVSUP WSS brochure; offers lacking this information will not be considered.