This notice is for the acquisition of NSN 7R-6610-016701033-H5, quantity 12 each, with delivery FOB origin. The item is flight critical and requires Government source approval; only previously approved sources have been solicited because technical data and manufacturing knowledge are not economically available to the Government. New sources must submit the required source approval information per the NAVSUP WSS brochure, and offers that do not provide all required data will not be considered. The Government intends to solicit and negotiate with only one source under FAR 6.302-1, but all responsible sources may express interest or submit capability statements. A determination not to compete will be made at the Government's discretion based on responses.