This model is inspired by https://www.printables.com/cs/model/326051-ikea-skadis-ptfe-holder-twist-lock-remix
PC4-M10 fitting fits into the model, it just requires more force to be applied.
Printed from PetG.
The author remixed this model.
I adjusted the dimensions to fit the model onto the board without damage, while still securely holding it in place. I also slightly reduced the size of the part with the hole and thread. I also created a version with a smaller diameter hole that precisely fits a 4mm PTFE tube.