Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 6499-344525-3 found under Amplifier Electroni by Raytheon Company. The National Stock Number assigned to this part is 5996013685733, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 6499-344525-3.