Portsmouth Naval Shipyard seeks one metal seal ring assembly under a 100% small-business set-aside, NAICS 339991 with a 600-employee size standard, evaluated on a lowest-price technically acceptable basis. The item is brand-name mandatory from Stein Seal Company, P/N SSCY 11079 Rev-B, and quotations for other manufacturers will not be considered. Offerors must submit descriptive literature showing compliance and complete provision 252.204-7016 with their offer; drawings are available separately only upon a valid DD Form 2345 and signed security agreement. Responsibility will be screened via SPRS/SAM, and non-manufacturers must identify the manufacturer’s name, location, and business size. Delivery/performance is for Portsmouth Naval Shipyard, with compliance required for numerous FAR/DFARS and local clauses covering cybersecurity, packaging, and delivery.