Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number S03440-1 found under Oscillator Crystal Controlled by Monitor Products Co Inc. The National Stock Number assigned to this part is 5963000050289, 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 S03440-1.