Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number TC20R04 found under Packing Preformed by Ta Instrument Case Co. The National Stock Number assigned to this part is 5330012878817, 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 TC20R04.