Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MD20K5 found under Switch Waveguide by Herley Industries Inc. The National Stock Number assigned to this part is 5985004764489, 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 MD20K5.