Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number CB1280-20 found under Heat Sink Insulator by Aeroflex Plainview Inc. The National Stock Number assigned to this part is 5999014176607, 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 CB1280-20.