Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number K560FX4UL found under Retainer Packing by Siemens Demag Delaval Turbomachi. The National Stock Number assigned to this part is 5330003986868, 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 K560FX4UL.