Presta Valve Cap
thingiverse
Replacement Cap for Presta/Racer Bicycle Valve. The precision of threads depends on printer and settings. The threads are intentionally loose. I've successfully printed this with a 0.4 mm nozzle and 0.2 mm layer height, no problem. Printing several in parallel is a good idea since it allows layers to cool before adding the next one. This prints without support needed.
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