Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 64509 found under Switch Waveguide by Espey Mfg And Electronics Corp. The National Stock Number assigned to this part is 5985015080920, 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 64509.