The Navy requires a parts kit for a 1/2-inch ball valve—one ball per Drawing 845-7285198 and two mating seats per Drawing 845-7285297—for a critical shipboard system designated Special Emphasis material with stringent quality, certification, traceability, testing, and configuration-control requirements. The order is a total small-business set-aside, a DO-rated defense priority order issued under Emergency Acquisition Flexibilities, and past performance will be considered. The contractor must maintain an ISO 9001 or MIL-I-45208 quality system, provide required certifications/OQE, and support Government quality assurance at source. Final material delivery is required on or before 365 days after the contract effective date, with PNSY review/acceptance of certification CDRLs six working days after receipt. The contracting activity is NAVSUP WSS Mechanicsburg, and Portsmouth Naval Shipyard references use DODAAC N50286.