This notice is for one unit of an NSN item (ref 901-032-812-107) requiring delivery FOB origin. The part is flight critical and requires Government engineering source approval, with only previously approved sources solicited. Alternate sources must qualify under design control activity procedures and submit the information detailed in the NAVSUP WSS Source Approval Brochure with their offer. The Government intends to solicit and negotiate with only one source under FAR 6.302-1, but all responsible sources may express interest and capability. Award will only be made if the offeror, product, or manufacturer meets qualification requirements at the time of award.