2017 300tq D ring upgrade.
I got the longer 1/4" X 4 1/2" self drilling bolts from Fastenal. The outside D rings are drilled into the main frame but the original bolts are too short.

Problem is that factory bolts are 1/4x 4" and too short. The top and bottom bolts are held by just a couple of threads. The center bolt has a better byte due to the D ring being recessed.

Longer bolts 1/4" X 4 1/2"

I don't think the new bolts will pull out
Center D rings
are drilled into a thin metal plate. I don't think they would pull out.

You can upgrade them with 1/4" X 4" Carriage bolts with nuts and washers.

Painted up

Keep in mind the more you tighten the more the thin metal plate will pull upwards. If this is a problem you may have to get some thicker steel plate that will hold it's shape. I don't put that much of a load on the center D rings so not a problem for me.