As an aid to running electrical wiring through a structure, alumina tubing parts (TU and XTU parts) have been provided which have the same outside diameter as the rods. The inside diameter of each tubing size is just big enough to clear the outside diameter of the next smaller size. Thus, parts can be nested according to the ingenuity of the user. The shorter tube parts are also useful in making high vacuum plug-in connectors, and rigid filament mounts (along with the clamps), and as bushings to insulate mounting holes. The tubing may also be used to pass threaded rods through a structure and then to load the structure in compression using machine nuts (MN parts). The use of threaded rods, however, is not as convenient as the other techniques described.
Product families include:
Al2O3-TU-B-XXX (XXX is the length)
The second picture on the left depicts a sampling of other Kimball Physics’ insulating eV Parts.