Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 3140-4643 FIND 40 found under Filter Radio Freque by Gse Holdings Inc. The National Stock Number assigned to this part is 5915013674280, and the Federal Supply Class is 5915 Filters And Networks. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 3140-4643 FIND 40.