I designed this 27mm nut cover to hide the standard rusty wheel nuts on my landrover defender.
Tight fit, a bit of a wobble and they will slide all the way on.
Had them on for 6 months and not had a single one fall off or come loose.
printed in PLA at 0.1 layer thickness with 30% infill and no support
but should print with less or more infill and a thicker layer if prefered.