Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number T-250-1563L5 found under Amplifier Radio Fre by American Telephone And Telegraph Co. The National Stock Number assigned to this part is 5996013629646, 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 T-250-1563L5.