Olivetti Studio 45 typewriter ribbon spool nut
thingiverse
So, I recently found an Olivetti Studio 45 on the street but the spool nuts were missing. I looked online and they charge you from 7 to 20€ just for one nut, so I decided to do a simple solution. For this nuts to work, you must thread the interior with a M3 x 0.5 tap like [this one](https://cdn-global-hk.hobbyking.com/media/catalog/product/cache/4/image/660x415/17f82f742ffe127f42dca9de82fb58b1/legacy/catalog/105586.jpg). I guess you could also, heat the piece and thread it slowly into the typewriter, but I've not tried this. I added and V2 version that has bigger threaded area, and smaller straight section. This way it still holds the spool tightly and it's easier to screw and unscrew.
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