Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A510 found under Attenuator Variable by Alpha Industries Inc. The National Stock Number assigned to this part is 5985004223415, 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 A510.