Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number APW 012 1881 75 found under Amplifier Radio Frequency by Ctt Inc. The National Stock Number assigned to this part is 5996013637066, 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 APW 012 1881 75.