I took skull base from @ncsandor (thanks for design!) and remodelled with some terrifying factors and adjusted so it match valve cap and is still printable without supports
Not for presta valve!
Print instructions:
0.4mm nozzle works good for me (for my MTB), I have already scaled original to best fit, so just print this at 100% scale or adjust slightly.
3mf file contains variable layer height, bottom part must be 0.05 layer height so the thread works well
no supports
Note that on image is just a render, not actual print photo (I am out of printer atm).