Trying to remove this broken off bolt. It spills freely, but can’t get it to back out, or even hammer out. Is there something inside this frame behind that plate cap, that’s holding it in?
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Drill the head of the bolt off and punch it inwards . Maybe there was a nutsert holding it on ? They look like a rivet but threaded ? Can’t be a welded nut as I don’t think you can weld steel to aluminum . Good luck
I’d just take an angle grinder and cut the head off and see what happens.
It is common for there to be a bushing or block inside tube, espicially aluminum, so that the box frame does not collapse when a bolt is tightened. My guess is that the bolt has galvanic corrosion between the dissimilar metals.
I am fighting a similar issue currently on an aluminum fish house.
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