Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 6615-99-1990119 found under Gyro Assy Special by Nato Stock Number Assigned By An. The National Stock Number assigned to this part is 6615000054371, and the Federal Supply Class is 6615 Automatic Pilot Mechanisms And Airborne Gyro Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 6615-99-1990119.