Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MD13T1D found under Switch Radio Freque by Herley Industries Inc. The National Stock Number assigned to this part is 5985012757322, 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 MD13T1D.