Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number D5016A found under Coupling Shaft Flex by Diamond Chain Co. The National Stock Number assigned to this part is 3010004937360, 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 D5016A.