This is a sole-source procurement for a specific NSN item requiring Government source approval prior to award due to its flight-critical nature. Only previously approved sources have been solicited; new sources must first qualify through the design control activity and submit all required source approval documentation, or their offers will not be considered. The Government intends to negotiate with only one source under FAR 6.302-1, though all responsible sources may express interest and submit capability statements. No budget amount or performance location is specified, and delivery is FOB origin. Interested parties are directed to the NAVSUP WSS Source Approval Information Brochures for the required submission details.