This is a sole-source procurement for one flow control valve (NSN 1615-016666488, part number 06650-08825-101) with delivery FOB origin. The government lacks sufficient data to contract with any source other than the current approved supplier. New sources require government approval, which cannot be obtained in time to avoid delaying award. Interested parties who are not already approved must submit all data required by the NAVSUP WSS Source Approval Brochure with their proposal. Offers failing to provide this required data will not be considered for award.