Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 15A00241-0000ITEM21 found under Seal Plain by National Oil Well. The National Stock Number assigned to this part is 5330013176273, 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 15A00241-0000ITEM21.