Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number HSX00003 found under Coupler Directional by Ducommun Technologies Inc. The National Stock Number assigned to this part is 5985012627186, 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 HSX00003.