Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AA52524 17A-21-2 found under Seal Plain Encased by Federal Commercial Item Description. The National Stock Number assigned to this part is 5330010679691, and the Federal Supply Class is 5330 Packing And Gasket Materials. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like AA52524 17A-21-2.