Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AT153U found under Horn Waveguide by Joint Electronics Type Designation. The National Stock Number assigned to this part is 5985005047776, 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 AT153U.