The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support MECH, is seeking to procure two valve assemblies with operational capabilities, under a presolicitation notice. The procurement involves a specific National Stock Number (NSN 7H-4820-016807732) and is intended for supplies or services that will be negotiated with a single source, as it has been determined that it is uneconomical to reverse engineer the part or purchase the necessary data from additional sources. This valve assembly is critical for maintaining operational readiness and functionality within naval systems. Interested parties are encouraged to express their interest and capability to respond to this requirement by contacting Joshua Eshleman at (717) 605-6055 or via email at joshua.j.eshleman@navy.mil, with proposals due within 45 days of the notice publication.