Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number M4002406 found under Coupling Shaft Rigid by Magnaloy Coupling Co Div Of. The National Stock Number assigned to this part is 3010012834088, and the Federal Supply Class is 3010 Torque Converters And Speed Changers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like M4002406.