Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number ROTEX 42 55 found under Coupling Shaft Flexible by Kone Oyj Hyvinkaan Tehtaat. The National Stock Number assigned to this part is 3010013874873, 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 ROTEX 42 55.