This is pin clip for mounting outer plastics of a car (old Honda CRV in my case).
Some ideas are taken from this Push Pin Clip.
I made tolerances bigger, wall shell stronger and insert shorter.
Pin fits to 8mm hole, pin base is 20mm wide and pin depth is 10mm.

I printed with colorFabb XT and 0.15mm layer height.

Ultimaker

S5

No

No

0.15

100