Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 2903240-4 found under Waveguide by Raytheon Company. The National Stock Number assigned to this part is 5985012733035, 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 2903240-4.