Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 56 022 13-4 POS. 19 found under Coupling Shaft Rigid by Cc Jensen Inc. The National Stock Number assigned to this part is 3010015512314, 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 56 022 13-4 POS. 19.