Presolicitation notice from the Department of Defense, Department of the Navy, for the procurement of NSN 7H-6105-015975173, TDP VER 001, REF NR A-365-315GP1. The notice states that the Government intends to solicit and negotiate with only one source, Hansome Energy Systems, under the authority of FAR 6.302-1. Interested parties may submit proposals or capability statements within 45 days. The notice also mentions that the Government does not own the data or rights to the data needed to purchase this part from additional sources, and it is uneconomical to buy or reverse engineer the part. The notice is not a request for competitive proposals, but interested persons may identify their interest and capability to satisfy the Government's requirement with a commercial item within 15 days.