Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SMS 75401 found under Flange Waveguide by Herley Industries Inc. The National Stock Number assigned to this part is 5985002803121, 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 SMS 75401.