I had issues with finding normal hinge without screws, insets etc, as I just needed a mechanism for closing/opening boxes, chests, bags etc. I designed several pieces as options, you can freely export those as .STL and use them in Fusion360 or Blender for your models. 

I import those for my needs, extrude and join/combine them with other parts of the model.

This mechanism can be easily printed and does not need any other additions/modifications to work.