This is a total small business set-aside Navy procurement for a parts kit for a 1 1/2 inch stop check, manufactured in accordance with NAVSEA drawing 803-2177934. The material is designated Special Emphasis Level I for use in a crucial shipboard system, requiring strict quality assurance, material traceability, certifications, and government source inspection. The contractor must maintain an ISO-9001 quality system with specified calibration standards and comply with extensive welding, brazing, thread inspection, and configuration control requirements. A one-year warranty from delivery applies, and the contract will be DO-rated for national defense under the Defense Priorities and Allocations System. Offerors should note that award will be issued bilaterally requiring written acceptance, and past performance will be considered in evaluation.