This is a sole-source procurement for a flight-critical item (NSN 7R-5985-016984608-RQ), quantity 5, delivered FOB origin. Government source approval is required before award, and only previously approved sources have been solicited. New sources must submit a source approval request with the required technical data and qualifications as detailed in the NAVSUP WSS brochure. Offers that fail to provide all required source approval information will not be considered. The Government intends to negotiate with only one source under FAR 6.302-1, but interested parties may express capability by responding to this notice.