Small Butt Hinge

thingiverse

This is a compact butt hinge that I haven't printed yet, but have designed as an upgrade over some commercially available butt hinges. It's mainly intended for boxes, but if you print it with metal filament, you can also use it on a door or gate. To make it even stronger, you could replace the pin with a 2 mm metal rod. You may need to sand down the parts to fit properly and make it smoother by applying oil.