The Department of Defense, specifically the Department of the Navy, is seeking qualified sources for the procurement of two units of a Linear Direct Valve, identified by NSN 4820 015672305. This presolicitation notice indicates that the Navy does not possess the technical data necessary for the production of this item, which has been determined to be a sole source requirement, meaning only approved sources may be considered for the supply of these spares. Interested parties must be certified as a Depot Overhaul Point (DOP) and submit a Source Approval Request (SAR) to be evaluated for their manufacturing capabilities, with the understanding that the approval process may be lengthy. For further inquiries, interested vendors can contact Tyreese C. Smith at 717-605-5937 or via email at TYREESE.C.SMITH.CIV@US.NAVY.MIL. Proposals must be submitted within 45 days of the notice publication, and the government retains discretion over the competitive procurement process.