F150 Receiver Safety Chain Grommets

I wanted to find a grommet that could try to keep the d-ring oriented the same way making it a little quicker/easier to hook the safety chains.  All I had on-hand was red 95a TPU-AMS which is pretty stiff.  I believe this could be printed in something like petg and probably still have enough flex to snap in to the eyelets.  The d-rings I'm using are ½" shackle d-rings. 

Printing suggestion - I printed them upside down (from the default stl orientation) with the slightly larger flange down on the build plate to try and avoid a larger overhang. The idea with the design was to have a larger overhang facing out and use the smaller overhang as a ‘snap’ behind the hole to keep it secured. I printed in 0.2mm w/ 6 walls (solid).  

NOTE - I do not know the precision of the safety chain holes on Ford's receiver hitch but there is enough room that I'd think they would work for most, mine is a 2020 F-150 and they fit with just enough slop. 

Let me know what your experience is!  

-----------------------------------------------
These are literally just grommets that keep the D-Rings from turning around or slopping one way or the other so it won't interfere with safety at all - these are essentially a small bit of padding between a very strong receiver hitch and very strong d-rings.  

F150-Safety-Chain-Grommet - smaller overhangs.stl
- Try this with either TPU or PETG - it should have just enough slop to let you snap it in. 

F150-Safety-Chain-Grommet - larger overhang tighter fit.stl
- This model will work better for a tighter ‘snap’ and is probably better if you are printing in any form of TPU. I wouldn't recommend trying a firmer filament like PETG with this model.