Using the Request for Quote (RFQ) form provided on this page, you can request competitive procurement options on part number B421539-1 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 B421539-1 It is listed as Lamp Block Assembly. component manufactured by Miltope Corporation, specifically under CAGE Code 54418. It is also accompanied by the NSN 6240009789638 for ease of organization, the first digits of the NSN indicating that the part belongs to FSC 6240 Electric Lamps.