Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number D21-10 found under Disk Clutch Nonvehicular by Triumph Magna Mixer Co. The National Stock Number assigned to this part is 3010005289501, 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 D21-10.