This is a total small business set-aside solicitation for the manufacture of Navy stems (NSN 1H9510-01-495-9543X2) used in a crucial shipboard system, with the material designated as SPECIAL EMPHASIS (Level I) requiring strict quality controls. The successful bidder will be supplied Government-furnished material to produce the stems, and all work must comply with detailed NAVSEA drawings, specifications, and a comprehensive quality system (ISO-9001 or acceptable alternative). Extensive certification, traceability, welding/brazing, and inspection requirements apply, including a Certificate of Compliance and Government quality assurance at the source. The contract is DX-rated for national defense under DPAS and will be awarded bilaterally under emergency acquisition flexibilities. A one-year warranty from the date of delivery is required.