Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number UG 1004 U found under Adapter Waveguide by Joint Electronics Type Designation. The National Stock Number assigned to this part is 5985002961358, 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 UG 1004 U.