This is a total small business set-aside for a Bonnet and Stem Assembly for a 1-inch stop check valve, designated as SPECIAL EMPHASIS (Level I) material for a crucial shipboard system. The contractor must provide and maintain a quality system in accordance with ISO-9001, with specific requirements for material traceability, certification, and welding procedures. Performance of Government quality assurance is at the source, and the place of performance cannot be changed without authorization. The contract is DO certified for national defense under the Defense Priorities and Allocations System. No budget information, non-bid timelines, or location for performance are specified.