Kitchen door/drawer.cabinet knobs in four variants :
32 mm diameter with 3,55 mm hole for screw (need to be threaded before assembly) - stl file : gałka2
32 mm diamater with 4,5 mm hole for threaded inserts (5 mm diameter) - stl file : gałka5
38 mm diameter with 3,55 mm hole for screw (need to be threaded before assembly) - stl file : gałka3
38 mm diamater with 4,5 mm hole for threaded inserts (5 mm diameter) - stl file : gałka4
I tried assembly with treaded hole in knob and screw and everything is ok. Next step I will try to smooth surfaces and put some acrylic paint on it.
Have fun, feel free to modify:)
PLA, no brims and no support is needed