Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 641011-1 found under Disk Clutch Nonvehi by Heligear Acquisition Co. The National Stock Number assigned to this part is 3010001017774, 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 641011-1.