Using the Request for Quote (RFQ) form provided on this page, you can request competitive procurement options on part number B449639-4 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 B449639-4 It is listed as Screw Thumb. component manufactured by Rca Corp Distributor And Special, specifically under CAGE Code 21921. It is also accompanied by the NSN 5305000268803 for ease of organization, the first digits of the NSN indicating that the part belongs to FSC 5305 Screws.