Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number S291 found under Angle Structural by Cessna Aircraft Company. The National Stock Number assigned to this part is 9540001454502, and the Federal Supply Class is 9540 Structural Shapes Nonferrous Base Metal. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like S291.