Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number HQ511 found under Coupler Directional by Technical Research And. The National Stock Number assigned to this part is 5985011103536, 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 HQ511.