This opportunity is for the procurement of 13 units of a flight-critical item (NSN 7R-1560-016002718-QE) that requires government source approval prior to award. Only previously approved sources have been solicited, and new sources must submit detailed technical data as outlined in the NAVSUP WSS Source Approval Brochure to be considered. The item must be delivered FOB Origin, and the government intends to negotiate with only one source under FAR 6.302-1, though all responsible parties may submit capability statements. Proposals from non-approved sources will not be considered unless all required source approval data is provided. The acquisition is subject to Free Trade Agreements and the World Trade Organization Government Procurement Agreement.