This opportunity is for the acquisition of 4 units of a specific part (NSN 6K-8145-010959027-GF) that requires engineering source approval from the design control activity. Only previously approved sources have been solicited, as the part is flight critical and technical data is not adequate for full and open competition. Delivery is FOB origin, and the part requires unique design capability and data rights held by the approved source(s). Prospective bidders who are not approved sources must submit detailed information per the NAVSUP WSS Source Approval Brochure with their proposal, or their offer will not be considered. No specific budget amounts or performance location are mentioned in the description.