Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AV5-521-244-89 found under Packing Preformed by Merritt Chapman And Scott Corp. The National Stock Number assigned to this part is 5330009599279, 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 AV5-521-244-89.