Using the Request for Quote (RFQ) form provided on this page, you can request competitive procurement options on part number 21974-4 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 21974-4 It is listed as Filter Radio Frequency Interference. component manufactured by M A Com Inc, specifically under CAGE Code 31887. It is also accompanied by the NSN 5915013432629 for ease of organization, the first digits of the NSN indicating that the part belongs to FSC 5915 Filters and Networks.