M3 screw knob

Theese are small knobs for the head of M3 screws, which are possible to use for belt tighteners of a 3D printer. The hole for the thread is D2.5mm, so you can fix the screw tight, the best way is to tap a m3 thread into the hole, or just turn the screw in.

Printed whitout support. With brim.

0.16mm layer height.

25% infill.