Composite bed question

I didn't have good luck with the Amazon D rings as they rusted up pretty quick. Beefier and far superior are these....

http://armysurpluswarehouse.com/military-issue-vehicle-cargo-tie-down/

 

I added a bunch of d-rings to mine including some fairly beefy ones on the inside of the inner fender wells. I just used big "fender washers" on the other side. They seem fine. For anything really heavy I'll just use the ones under the factory bed bolts that hook to the frame, I also added additional ones under those bed bolts that didn't have them.

I've horsed down on the ones I drilled the bed for pretty tight though and had no issues... So far. The ones I added used two bolts each.

 

That's what I used on the bed bolts. Works great.