Using the Request for Quote (RFQ) form provided on this page, you can request competitive procurement options on part number 856-691-040 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 856-691-040 It is listed as Retainer Spring Valve. component manufactured by Dresser Rand Co Terry Corp Steam, specifically under CAGE Code 0DFD9. It is also accompanied by the NSN 4820011832434 for ease of organization, the first digits of the NSN indicating that the part belongs to FSC 4820 Valves Nonpowered.