Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 384517-39 found under Cone Exhaust Rocket Motor by Aerojet Rocketdyne Inc. The National Stock Number assigned to this part is 1420004069589, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 384517-39.