Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number CA4156 found under Dummy Load Electric by Federal Aviation Administration. The National Stock Number assigned to this part is 5985000272245, 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 CA4156.