Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number WM2-561M1 found under Shaft Assy Flex 41 by Smith And Smith Aircraft Co. The National Stock Number assigned to this part is 1680004845175, and the Federal Supply Class is 1680 Miscellaneous Aircraft Accessories And Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like WM2-561M1.