MIL-A-22641-18 Adapters, Coaxial To Waveguide \(Class Iii - .625 Inch\), Types Ug-403/U, Ug-404/U, Ug-445/U, Ug-520/U, Ug-521/U, Ug-523/U, Ug-1647/U, Ug-1648/U, Ug-1649/U, Ug-1650/U, Ug-1651/U And Ug-1652/U