Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number R47AA1A1 found under Heat Sink Electrical Electronic by Mcdonnell Douglas. The National Stock Number assigned to this part is 5999008222114, and the Federal Supply Class is 5999 Miscellaneous Electrical And Electronic Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like R47AA1A1.