Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 21-10644 ITEM3 found under Packing Assembly by Macgregor Sweden Ab. The National Stock Number assigned to this part is 5330014471138, 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 21-10644 ITEM3.