Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 581R389H01 found under Filter Radio Frequency Interfere by Sfe Technologies. The National Stock Number assigned to this part is 5915002991972, and the Federal Supply Class is 5915 Filters And Networks. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 581R389H01.