Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 037-003771-001 found under Amplifier Radio Frequency by Raytheon Technical Services Company. The National Stock Number assigned to this part is 5996013538015, 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 037-003771-001.