Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number EG1721R000 found under Element Coupling Shaft by American Vulkan Corporation. The National Stock Number assigned to this part is 3010014663015, 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 EG1721R000.