This Navy procurement is for a Parts Kit for size 1 1/2- and 2-inch Ball Valves, consisting of one Ball (Piece 7) and two mating Seats (Piece 9), built to Naval Ship Systems Command Drawing 803-4385050 and associated engineering documents. The material is designated SPECIAL EMPHASIS / Level I for a crucial shipboard system, requiring rigorous quality, certification, traceability, configuration control, and Government quality assurance at source. The requirement is a total small business set-aside, and the resulting award will be DO/DX rated under DPAS and issued bilaterally, requiring the contractor’s written acceptance. The contractor must maintain an ISO-9001 or MIL-I-45208 quality system, submit welding/brazing procedures and qualification data, and comply with inspection, test, and certificate-of-compliance requirements. A one-year warranty from date of delivery applies, and any new procedure qualification requires at least 72-hour notification to DCMA for possible observation.