Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number S1544600 found under Beam Structural by Boeing Aircraft. The National Stock Number assigned to this part is 9540008813897, 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 S1544600.