This tipe of screw are more useful to tighten two peces where you don't want put an iron screw and you don't want apply more force.
These screws are very elegant to keep in sight
It does not need supports and as soon as the printing is finished they can be assembled.
I've use PLA+ to print: extruder 215 °C, bed 60 °C
This design is very accurate in all of details with a resolution of 0,05mm
I hope this can help you and your project, good prints!!