About this 3D model

While I was experimenting with trapezoidal threads I found out that this nut and bolt combination is quite a nice fidget toy. The parts are easy to print without support but they need a layer height of 0.12mm or smaller. Otherwise the outside of the thread flanks is not supported by the underlying layer. Besides that I recommend 3 walls, 4 to 5 tops & bottoms and 15% infill.