Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number GD1321-5 found under Gasket by Messier Dowty. The National Stock Number assigned to this part is 5330010097080, 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 GD1321-5.