Using the Request for Quote (RFQ) form provided on this page, you can request competitive procurement options on part number 4B2031 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 4B2031 It is listed as Cap Filler Opening. component manufactured by Eaton Aerospace Llc Div Engineer, specifically under CAGE Code 97484. It is also accompanied by the NSN 5342013902920 for ease of organization, the first digits of the NSN indicating that the part belongs to FSC .