Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 305-0258-003 found under Amplifier Radio Frequency by Comtech Xicom Technology Inc. The National Stock Number assigned to this part is 5996014851280, 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 305-0258-003.