Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SM C 561779 found under Adapter Mast by J And H Smith Mfg Co Inc. The National Stock Number assigned to this part is 5985004778335, 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 561779.