Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 63B52579-7 found under Gasket by Manufacturers Gasket Co The. The National Stock Number assigned to this part is 5330015146884, 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 63B52579-7.