Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 642 1859 002 found under Antenna Tuner Assy by Ruggles Klingemann Mfg Co. The National Stock Number assigned to this part is 5985011537785, 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 642 1859 002.