Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1-13691-0000 found under Coupling Shaft Rigid by Regal Beloit Corp Durst Div. The National Stock Number assigned to this part is 3010013298817, 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 1-13691-0000.