This opportunity is for a fixed-price contract to manufacture a specialized stem for a stop check valve, designated as Special Emphasis material for a crucial shipboard system. The contractor must maintain a quality system compliant with ISO-9001 and provide extensive certifications, including chemical and mechanical analysis, with material delivery required within 365 days after the contract's effective date. All certification data must be submitted at least 20 days before the material delivery date, with a 6-working-day government review period. The contract is a total small business set-aside with a "DO" priority rating for national defense, and performance is subject to government quality assurance at the contractor's source location. Only offerors with an acceptable Quality Assurance Manual are eligible for award.