The Portsmouth Naval Shipyard requires valve stem fasteners, Northrop Grumman P/N 6D60814-001 per drawing 6509E59/G, with two line items of 2 EA each (total 4 EA). This requirement is sole-sourced to Northrop Grumman because the parts are direct replacements for existing equipment and the data is proprietary; quotations for a different manufacturer will not be considered. Award will be made on a Lowest Price Technically Acceptable basis, and offerors must provide descriptive literature demonstrating compliance and complete the attached provision 252.204-7016. Quoters must be registered in SAM, and if not the actual manufacturer, must identify the manufacturer’s name, location, and business size. Quotes should be submitted by email to the listed contacts, with price, FOB point, Cage Code, point of contact, business size, and preferred payment method (GCPC or WAWF); payment terms are Net 30 days after acceptance.