Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4Y20017-103A found under Bungee Assembly by Cef Industries Inc. The National Stock Number assigned to this part is 6615001136996, 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 4Y20017-103A.