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 Model for a thermostat dial. 
 
+![The thermostat dial installed on a thermostat](thermostat-dial.jpg)
+
 The dial fits onto a pin with a flat side. The part which mates with the thermostat pin tends to break on the originals. I measured the pin diameter as 6.37 mm and the flat to opposite edge as 4.08
 
 I did some fit tests and found that 0.2 mm clearance (as measured after print) worked well with a tight fit that could still be removed without too much trouble.
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