Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number NA 47291 ITEM 13 found under Filter Cap by Hale Products Inc. The National Stock Number assigned to this part is 2940995357662, and the Federal Supply Class is 2940 Engine Air And Oil Filters Strainers And Cleaners Nonaircraft. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like NA 47291 ITEM 13.