Using the Request for Quote (RFQ) form provided on this page, you can request competitive procurement options on part number 503-4 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 503-4 It is listed as Terminal Lug. component manufactured by Zierick Mfg Corp, specifically under CAGE Code 79963. It is also accompanied by the NSN 5940001777973 for ease of organization, the first digits of the NSN indicating that the part belongs to FSC 5940 Lugs Terminals and Terminal Strips.