Do you have photos? You used an 8 mm drill bit and went in 4 cm?
I live in rebar reinforced concrete (it's like living in a cave) and am
trying to figure out exactly how much of a hole I need to drill to hang
Most things (like our air-conditioner) are hung by drilling a hole
(probably about 0.5 cm wide by 2 cm deep) into the cement, hammering in
a plastic (possibly it's nylon) plug, and then screwing in the bolt.
This sort of thing will pull straight out, but can hold weights pulling
> If this is what you want to do and have concrete walls, then you can
> do what I did, using 8x40mm nylon plugs and 4mm corresponding hooks.
> I have now 3 pairs around the house and use them on a daily basis
> (including sleeping overnight).