Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MR-Y0009 found under Structural Section by Raytheon E Systems Inc. The National Stock Number assigned to this part is 9540011156679, 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 MR-Y0009.