Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 6 5271510 found under Coupling Shaft Flex by Flender A Friedrich Ag. The National Stock Number assigned to this part is 3010123393517, 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 6 5271510.