Using the Request for Quote (RFQ) form provided on this page, you can request competitive procurement options on part number B31937 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 B31937 It is listed as Valve Washer. component manufactured by Flowserve Corporation Div Flowse, specifically under CAGE Code 85130. It is also accompanied by the NSN 4820000010006 for ease of organization, the first digits of the NSN indicating that the part belongs to FSC 4820 Valves Nonpowered.