Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 340-0090503-633 found under Insulationthermalspecial Purpo by General Dynamics Corporation. The National Stock Number assigned to this part is 5330000349147, 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 340-0090503-633.