Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SM-C-717777 found under Adapter Waveguide by Spencer Industries Inc. The National Stock Number assigned to this part is 5985011075071, 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 SM-C-717777.