EDM COPPER or BRASS THREADED RODS TAPS THREADING HOLE

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For sale is a lot of threaded brass or copper EDM tubes. I would supposed that they are for EDMing threaded holes in material, though of course I have no idea what is their exact use. They come from a cabinet full of EDM supplies. You can get the idea of pitches from the labels on boxes. ONLY ONE TRAY IS INCLUDED, the one on top that you see in all pictures.


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