This is a total small-business set-aside Navy procurement under Emergency Acquisition Flexibilities for a parts kit for a size 3-inch ball valve—one ball and two mating seats—manufactured to NAVSEA drawing 801-6408778 and designated special-emphasis material for a critical shipboard system. Offerors must possess a valid U.S. Security Clearance of Confidential or higher because the solicitation includes a Confidential-level annex, and classified material must be handled under NISPOM/Industrial Security Regulation requirements. The order requires higher-level inspection and a documented quality system meeting ISO-9001 with ISO-10012/ANSI-Z540.3/ISO-17025 calibration, or MIL-I-45208 with MIL-STD-45662, plus material and test certifications such as hydrostatic or dye-penetrant testing for each ball. The award will be bilaterally executed, rated for national defense under DPAS, and evaluated with past performance considered; the warranty is one year from delivery, and new weld procedure qualification requires at least 72-hour notification to DCMA for observation.