Wall depths

How deep are the walls in the RPODs to drill safely?  What fasteners are recommended (or used) successfully?

For purposes of hanging or securing items to bulkheads inside.

I'm thinking of short Molly anchors.

What say?

Burt

RP171
Tow:  Ranger 4.0L,4WD
1 wife
1 Labradork dog

So far, for interior mounting of lightweight racks, and shelves, i use 1/2 x 6 pan head sheet matal screws. I have hung Closetmaid baskets, racks for condiments, wire racks above the sink made from shower hanger racks, and even wood shelves supported with angle brackets. I use Closetmaid omega shaped brackets (somewhat costly, and with extra screws and anchors, but great for wire baskets).
I have not had a single failure. Most of the stuff we hang doesn't weigh more than 5 lbs and the walls are 1/8" plywood which is really quite tough - it handles the coarse thread screws well - I don't pre-drill with my big driver to do the work. If you remove the factory stuff you find they use a similar screw - actually even finer diameter and thread.

On the outside, I mounted a couple of those adjustable flagpole holders to hold a shower curtain above the exterior shower I installed. For these I used short mollys and a dab of silicone to keep the surface from rusting. To mount the shower box, I used 3/4 x 8 stainless steel sheet screws through the fiberglass - there were 10, so I figured there was enough screws to hold the box in place. And two of them actually went into an aluminum structural upright, ensuring a solid mounting.

Thank you to all who replied with useful information regarding the wall thicknesses.  It's very helpful to get this kind of information before you make a mistake or damage something.

Burt
Laura the White Tornado
Buddy the Wonder Dog (labradork)
Tow 4.0L Ranger
Rpod 171

Hmmm... Curious, everything I've pulled out of the walls has been white and beady. Can't say I have been into the rear curve, tho. The factory pics that folks have posted show styrofoam insulation between inside and outside. But Fiberglas might be easier in the curved rear end.

I'll bring the wall section I cut out for my out side shower to the roundup.