Using the Request for Quote (RFQ) form provided on this page, you can request competitive procurement options on part number DD-4639 with rapid responses always offered by our staff. To ensure that you locate and procure exactly what you need with ease, we list parts with as much information as we can. For example, part number DD-4639 It is listed as Valve Plug. component manufactured by Parker Hannifin Corporation, specifically under CAGE Code 53234. It is also accompanied by the NSN 4820014983608 for ease of organization, the first digits of the NSN indicating that the part belongs to FSC 4820 Valves Nonpowered.