[scook]

Thanks Destroyer - they seem similar in principal to some concrete anchors we use but I've never come across them. Learn something most days.

I'd be concerned about corrosion too but don't have any experience with them. I have a bunch of stripped screws in my hatch cover. I'd thought about those sheet metal nut things that are/were used in automotive applications (they slip over the edge) if I could get them in stainless.

My other idea is an epoxy repair that adds thickness under the fairly thin stripped out flange. I thought about using wide masking tape to create kind of a bag to hold the epoxy in place until it set and allow a thickness of 1/2" to 3/4""- maybe use Marine Tex. What do you guys think of that?