Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A51A9052A found under Coupler Directional by Centroid Inc. The National Stock Number assigned to this part is 5985000039150, 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 A51A9052A.