Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AC503P found under Switch Radio Frequency Transmiss by Litton Systems Inc. The National Stock Number assigned to this part is 5985004871746, 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 AC503P.