Both "The Twilight Zone", and "The From U.N.C.L.E." were filmed at MGM studios, and TLZ used practically every prop, costume, and set piece left over from FP. Standard proceduer for movie studios.
TMFU used the device from FP that had the large clear dish that was in the background during the outside Klystron Frequency Modulator scene. In "The Brain Killer Affair" it was mounted on the wall as part of the brain killing machine. And in "The Cherry Blossom Affair" it was used a a device to make volcanoes erupt. For a background prop it was pretty elaborate, as it had functioning lights, those white tubes look to be neon lights.
One of the probe arms from the Krell Plastic Educator was used as a microphone in the communications room at U.N.C.L.E. HQ. One episode of "The Girl From U.N.C.L.E." even used the C-57-D miniature, although I believe that most of the effects were reused from TLZ. The episode was "The Flying Saucer Affair".
David.