Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number E280121 found under Disk Clutch Nonvehicular by American Hoist And Derrick Co. The National Stock Number assigned to this part is 3010009472394, 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 E280121.