Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A1440 found under Attenuator Variable by Probescope Co Inc. The National Stock Number assigned to this part is 5985009163166, 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 A1440.