Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 021 0248 50HZ found under Clutch Assembly Friction by Wayne Dalton Corp. The National Stock Number assigned to this part is 3010011826881, 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 021 0248 50HZ.