The Government proposes a three-year Indefinite Delivery Indefinite Quantity contract for a CHINOOK gate valve, NSN 4820-00-471-6737, Part Number HM022-420, with quantities from 5 to 21 each and a production lead time of 5 units after contract award without First Article Testing, delivered to Tracey, CA 95304-5000. The item is restricted to Robertson Fuel System and approved distributors TNL Sales, Kampi Components, and Integragrated Procurements, and the data needed for a competitive acquisition is not physically or economically available. All offerors must meet prequalification requirements, and firms that can produce the item are encouraged to identify themselves and seek source approval for future solicitations. No telephone requests will be accepted; requests and communications should go by email to Kimberley Collier with the company name, Cage Code, and telephone number.