Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number U51-5880-1 found under Coil Radio Frequenc by Raytheon Technical Services Company. The National Stock Number assigned to this part is 5950002284692, and the Federal Supply Class is 5950 Coils And Transformers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like U51-5880-1.