Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number HFA 0-50-1DB found under Attenuator Fixed by Applied Research Inc. The National Stock Number assigned to this part is 5985012799758, and the Federal Supply Class is 5985 Antennas Waveguides And Related Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like HFA 0-50-1DB.