Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 697-121-1 found under Failure Monitor by Safe Flight Instrument Corporation. The National Stock Number assigned to this part is 5963010881810, and the Federal Supply Class is 5963 Electronic Modules. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 697-121-1.