Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 424817 ITEM 7 found under Retainer Packing by Western Filter A Division Of. The National Stock Number assigned to this part is 5330012136926, 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 424817 ITEM 7.