Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number XR-11 2RSB found under Coupling Shaft Flex by Link Belt Construction Equipment. The National Stock Number assigned to this part is 3010012402041, 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 XR-11 2RSB.