This is a sole-source notice for a specific NSN part, quantity 17, requiring engineering source approval from the design control activity due to unique data and manufacturing knowledge held by the approved source(s). An alternate source must qualify through government-approved procedures. Delivery will be made to DLA Distribution in New Cumberland, PA, and DLA Distribution San Joaquin in Tracy, CA. The government intends to solicit with only one source, but all responsible parties may express interest or submit capability statements. Any award will require the offeror or manufacturer to meet the qualification requirements at the time of award.