Presolicitation notice from the Department of Defense, Department of the Navy, for the procurement of ARM SSY, DOWN LOCK, NSN 7RH 1620-008079674. This item is used in aerospace craft components and accessories. The notice specifies a quantity of 25 units and delivery FOB origin. Engineering source approval is required to maintain the quality of the part. The approved source(s) retain data rights and manufacturing knowledge essential to maintaining the part's quality. Alternate sources must qualify according to the design control activity's procedures. Interested parties must submit the required information for source approval. Failure to provide all necessary data will result in disqualification. The notice also provides links to brochures with additional information. The Government is not using FAR Part 12 policies for this solicitation. Interested parties with the capability to provide a commercial item may notify the contracting officer within 15 days.