Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SM-D-657650 found under Drive Antenna by Rotating Precision Mechanisms Inc. The National Stock Number assigned to this part is 5985010623134, 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-D-657650.