Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 11583A found under Attenuator Set by Keysight Technologies Inc. The National Stock Number assigned to this part is 5985004902361, 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 11583A.