Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 137 120 A3274155 001 found under Shim Waveguide by Advanced Technical Materials Inc. The National Stock Number assigned to this part is 5985015335691, 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 137 120 A3274155 001.