Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A3800 found under Heat Sink Electrica by The Electric Tachometer Corp. The National Stock Number assigned to this part is 5999012397817, 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 A3800.