How do I fit this bolt to an outside wall?

nobile

Got a bracket to fix to the wall - 4 of these 'bolts' were supplied. No instructions, just pictures which explain very little.

Ive posted 2 images - 1 bolt which is in a closed state, and the other opened up to show all the bits.



I understand I have to drill a hole in the wall, insert the bolt...but from what I can see, the screw bit that goes into the sleeve doesnt latch onto anything, even when I tighten the nut at the end.

What am I missing? What exactly goes into the 'hole in the wall'!

Many thanks!

WestonDave

I think the idea is that as you tighten the bolt into the nut, it pulls the section in the middle out of shape effectively wedging it into the brick. So you put the whole thing in (presumably having put whatever you want to attach between the bolt and the washer first) and then just tighten it all up.

Chunks

They look a tad like these:

http://www.transtools.co.uk/store/prod_6160/screws-and-fixings/fixings/masonry-sleeve-anchors/sleeve-anchors-masonry-hex-bolts-m12-x-129mm-25-pack.html

Bit more here:

http://www.acehardware.com/info/index.jsp?categoryId=1283458

nobile

WestonDave wrote: »

I think the idea is that as you tighten the bolt into the nut, it pulls the section in the middle out of shape effectively wedging it into the brick. So you put the whole thing in (presumably having put whatever you want to attach between the bolt and the washer first) and then just tighten it all up.

Thats what I thought, but the 'screw' bit of the whole thing just passes through the sleeve freely, no resistance (like a screw in a rawl plug for example, which expands the plug as you tighten)

WestonDave

nobile wrote: »

Thats what I thought, but the 'screw' bit of the whole thing just passes through the sleeve freely, no resistance (like a screw in a rawl plug for example, which expands the plug as you tighten)

Exactly! the sleeve is just a sleeve - the sleeve becomes compressed because it becomes crushed between the bolt head on the end (plus whatever you are fixing) and the nut. As you tighten the nut it moves up the screwthread leaving less and less room for the sleeve which distorts outwards, gripping into the wall

nobile

WestonDave wrote: »

Exactly! the sleeve is just a sleeve - the sleeve becomes compressed because it becomes crushed between the bolt head on the end (plus whatever you are fixing) and the nut. As you tighten the nut it moves up the screwthread leaving less and less room for the sleeve which distorts outwards, gripping into the wall

That sounds more like it!

Just 1 question. The little bit on the end also goes in?

WestonDave

nobile wrote: »

That sounds more like it!

Just 1 question. The little bit on the end also goes in?

Yes that's the nut - in effect you have a bolt (the bit with the red tag on in your top picture) a sleeve - the bit with the holes in the side and a nut - the "little bit". You put the bolt through whatever you are fixing to the wall, then put the sleeve over the bolt, and finally put the nut on the end tightening it all up as much as you can with your fingers. You then insert the whole lot into wall, and use a spanner etc to really screw the bolt head round as far as you can to distort out the sleeve. Do not turn it the wrong way as the nut will fall off and be stuck in the wall irretrievably!

ormus

you could try these instead. the bolt stays in situ, and the nut comes off.
theres no danger of losing the nut inside the wall.

nobile

Thanks all - job done, kind of...sort of

C_Mababejive

Make sure you drill the right sized hole. It might be stamped on the bolt somewhere.

karl-123

wedge the bolt in then turn the nut to expand the middle bit