Bosch 28mm osVAC vacuum cleaner connection for GKS, GST and GEX 12V

This osVAC adapter fits the Bosch 19mm dust extraction connection. It has been tested on my 12V circular saw and on the multicutter (Stichsäge).

There are two versions of the adapter, a larger one where the osVAC plug is at an angle, and a small one which fits directly onto the plug.

For sealing and a tight fit I used an O-ring 20x27x3.5mm, but you can also use some tape to achieve a tight and permanent fit.