Using the Request for Quote (RFQ) form provided on this page, you can request competitive procurement options on part number 503S 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 503S It is listed as Retainer Packing. component manufactured by Ruthman Machinery Co, specifically under CAGE Code 23724. It is also accompanied by the NSN 5330011781932 for ease of organization, the first digits of the NSN indicating that the part belongs to FSC 5330 Packing and Gasket Materials.