M myrto said:
So if I go with the solution to use the 6mm for the last bit, is it best to start drilling with the 6mm or the 8mm first?
8mm of course
 
A atomlab said:
Since you have the wrong screw to fasten brackets, it is best to buy new screws for the purpose.

Additionally, fully threaded.
Ah, but how typical, why did they give me these countersunk screws at Hornbach?! I bought the brackets from them at the same time, so he knew what I was going to do, and he went around picking these out for me :(
It's hard now to get to Hornbach/Bauhaus etc. They are far away, and I don't have an available car right now. Is it completely wrong to use countersunk anyway?
 
Claes Sörmland Claes Sörmland said:
A bit odd too that the screw is longer than the plug. Shorter screws?!
The screw should ALWAYS go through the plug about 5-6mm (the screw's diameter is usually mentioned) for the plug to do its intended job.
 
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M myrto said:
Ah but so typical, why did they give me these countersunk screws at Hornbach?! I bought the brackets from them at the same time so he knew what I was going to do and he went around picking these for me :(
It's hard now to get to Hornbach/Bauhaus, etc. They are far away and I don't have an available car right now. Is it completely wrong to use countersunk anyway?
It will work just fine. But when there were opportunities to get the right stuff, it's a shame it didn't go all the way. The board part should sit in the subject you're fastening. Now you have the majority of the screw in the wall completely unnecessarily. Is it flat metal or countersunk hole in the metal?
 
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A atomlab said:
It will work just fine. But when there were opportunities to get real tools, it's a shame it didn't go all the way. The board portion is supposed to be in the material you’re fastening. Now, you have most of the screw in the wall for no reason. Is it flat sheet metal or countersunk hole in the metal?
It is flat sheet metal... Tried a bit with the screw after I read your post and of course it gets a bit tricky, the screw doesn't quite go through. It might stick out about half a millimeter...
 
Fairlane
Drive with the screw you have. It can be changed later on (which you probably never do).
If you get a good grip, it will handle substantial weight.
 
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There are screws in more places. A countersunk screw in something completely flat rarely looks nice. Perhaps you have a Clas Ohlson or Järnia store nearby? Or maybe your local grocery store has a small but adequate selection of screws for this? What you're looking for is fully threaded, i.e. threads along the entire length of the screw, with a flat surface against the wall. The length of the one you have seems fine, slightly shorter works. The head should be slightly larger than the hole in the brackets; double-check that as the things you've been helped with don't seem completely thought through.
 
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Thank you so much everyone for your help and input! I'll try with the screws I have and see what happens. :)
 
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Claes Sörmland
Nicro Nicro said:
The screw should ALWAYS go through the plug about 5-6mm (usually you say the screw's diameter) for the plug to do the job as intended.
I pictured that TS had enormously long screws for their plugs, not that they just slightly go through the plug.
 
Hello.
You may have already drilled your holes.
If not, drill with the 8mm drill until it doesn't reach further. Then use the 6mm drill to get the right depth for the hole.

Matte
 
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If you drill first with 6mm, there's a risk that the 8mm drill might catch, I think. The reverse, as others suggest, works fine.
 
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Daggew
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M myrto said:
Ah, but so typical, why did they give me these countersunk screws at Hornbach?! I bought the brackets from them at the same time, so he knew what I was going to do, and he went around and picked these out for me :(
It's hard now to get to Hornbach/Bauhaus, etc. They're far away and I don't have an available car right now. Is it completely wrong to use countersunk anyway?
The knowledge of the staff at these stores is extremely lacking and often virtually non-existent. Today, not many stay very long at these types of workplaces and thus don't have time to learn anything. Employers do not take their responsibility either and do not send staff for training, perhaps because they know that most will have left within a year anyway.
The result is that most of the staff guess or convince themselves that they "know" the answer to all the questions they get so as not to appear foolish in the situation.
 
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M myrto said:
I've never drilled before, but now it's time. I'm going to drill into concrete and I have 8mm plugs and 6/70 screws. But now that I've borrowed the hammer drill, I see that the 8mm drill bit is shorter than the screw. It's enough for the plug, but the screw will end up on the other side of the plug where I can't drill...How do I fix this?? Can I first drill with a 6mm bit that is longer for the screw's sake?
M myrto said:
This is what it looks like. The short bit is 8mm. The long one is 6mm.
Isn't there a little misunderstanding here? Is the screw really too long? The screw head shouldn't be pulled all the way up to the plug. I guess the unthreaded part sits inside the bracket. So the thread might be just the right length for the plug. If it still bottoms out (check before you put the plug in), extend the hole with the 6mm bit. That is, 8mm first, then run the 6mm inside the existing hole.
 
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Claes Sörmland Claes Sörmland said:
Typically, rotary hammers are a better idea than hammer drills in concrete. But maybe you have a rotary hammer?

Normally, the solution is to have a drill bit long enough. It's also a bit odd that the screw is longer than the anchor. Shorter screws?!

Drilling with a larger drill bit in a slightly smaller hole in hard and crack-prone materials like concrete can be tricky. The bit can get stuck in the hole, and sometimes larger concrete pieces can crack off around the hole. But maybe that's mostly a problem with larger diameters of the holes? It's probably there that I've encountered this issue.
Would it be completely wrong to drill the 8 mm hole first and then extend with the 6 mm drill bit? Then there shouldn't be any risk of cracks.
 
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All reasons to buy tools are good reasons.

I would definitely invest in a new drill, especially since they cost very little.
 
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