The Department of Defense, through the Defense Logistics Agency (DLA Land and Maritime), is seeking offers for the procurement of a disk valve, identified by National Stock Number (NSN) 4810-01-492-1990. This acquisition is critical as it involves supplies for which the government does not possess complete technical data, and the contract will be awarded only to approved sources, specifically VACCO Industries, for the specified part numbers. Interested suppliers are encouraged to submit proposals by the amended solicitation close date of October 28, 2025, with the solicitation expected to be available on DIBBS after September 12, 2025. For further inquiries, potential bidders can contact Mandy Phipps-Kuhlman at mandy.phipps-kuhlman@dla.mil.