Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SDO6270138 found under Waveguide Assembly by Drs Sustainment Systems Inc. The National Stock Number assigned to this part is 5985013050871, 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 SDO6270138.