Using the Request for Quote (RFQ) form provided on this page, you can request competitive procurement options on part number BN21E4 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 BN21E4 It is listed as Nipple Assy. component manufactured by Transdigm Inc Aero Controlex Gro, specifically under CAGE Code 79326. It is also accompanied by the NSN 4730012389954 for ease of organization, the first digits of the NSN indicating that the part belongs to FSC 4730 Hose Pipe Tube Lubrication and Railing Fittings.