Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1012953B300-012 found under Retainer Packing by Boeing Company The. The National Stock Number assigned to this part is 5330001469796, 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 1012953B300-012.