Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 3451638-2 found under Waveguide Assembly by Sensor And Antenna Systems. The National Stock Number assigned to this part is 5985013728106, 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 3451638-2.