Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number NA 47291 26 found under Outer Sleeve by Hale Products Inc. The National Stock Number assigned to this part is 4820998591983, and the Federal Supply Class is 4820 Valves Nonpowered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like NA 47291 26.