Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 2142-BBS4A5DRR found under Nrp Amplifier Radio by Empower Rf Systems Inc. The National Stock Number assigned to this part is 5996016172157, 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 2142-BBS4A5DRR.