Concrete expander that leaves internal thread?

[Troberg]

I want to attach things to a concrete wall, but the expansion bolts I find leave a protruding bolt.

Is there a product that instead leaves a threaded M10 hole, so that there's nothing sticking out and in the way if nothing is mounted there?

 

[Casaloco]

check out drop-in anchors and sleeve expanders hilti has among others. There are probably other manufacturers as well

 

[cpalm]

You can also use threaded sleeves and anchor compound.

 

[Troberg]

Thank you! So much easier when you know what the things are called...