Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number M1M5573 12 found under Seal Plain Oil by Rockwell International Corp. The National Stock Number assigned to this part is 5330010628215, 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 M1M5573 12.