Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MD-50S2D found under Phase Shifter Elect by Herley Industries Inc. The National Stock Number assigned to this part is 5915012791814, and the Federal Supply Class is 5915 Filters And Networks. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like MD-50S2D.