Screw plug for a 20 liter (5 gallon) bottle
thingiverse
Print as is in STL, minimum support. I printed PETG with a little overheating, so that there was a tightness and did not tear. Airflow 100%, support angle from 61 *. The thread there is metric, and this is 60 *. The bottle can not be printed without supports, it is almost trapezoidal. Yes, and a small step is needed, otherwise it will become monstrous in size. I loosened the thread by 0.5 mm and screw it up perfectly. Seal printed from TPU (this is google translation, sorry)
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