Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 203028 found under Seal Ring Metal by Walter Motor Truck Co. The National Stock Number assigned to this part is 5330005340169, 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 203028.