What fastener is this for?

[angelboy]

Got a bag full when I bought a load of fasteners from auction.

There's a standard SS bolt with a rubber sleeve that has a brass insert for the bolt to nip up to.

Just wondering what they're used for as they look pretty specific.

 

[dzj]

According to Google images, they're asphalt speed bump fixings.

 

[marcros]

Hopefully the rest of the lot were more useful!

 

[angelboy]

According to Google images, they're asphalt speed bump fixings.

They do look like asphalt speed bump fixings BUT they're only 30mm!!!

 

[angelboy]

In fact I wish they were asphalt speed bump fixings because they're £4 each at Screwfix and I must have 150 of them!!!!!

 

[nev]

Drill a hole the width of the rubber sleeve, poke said item through and tighten bolt and it expands as it squashes. I use them to fix my bike seat on to the frame. (It has a sheet aluminium base)

 

[angelboy]

I found these that look like a similar application.

One is for a toilet seat.

It looks like you can use them like you would a rawl plug maybe???

 

[Racers]

My motor bike screen if fixed to the fairing with them.

Kawasaki ZXR750j by Pete Maddex, on Flickr

Pete

 

[large red]

Got a bag full when I bought a load of fasteners from auction.

There's a standard SS bolt with a rubber sleeve that has a brass insert for the bolt to nip up to.

Just wondering what they're used for as they look pretty specific.

I have used them, to fix down Acme stair treads. They are on most of the concrete staircases in London Underground stations.
If anyone's interested they are a ***** fixing.

 

[Lons]

Cavity fixings, I've got a box of mixed lengths. Very useful on various surfaces but if you overtighten in materials such as plasterboard they'll pull through.

 

[novocaine]

what Lons said although I was told they are called rubber anchor or rivet nuts, rub nuts or well nuts.

they were from the marine world as they have no corrosion increase and they do good in places that rattle a lot, kwakisaki, sucksuki and blonda all used them at some point for things like screens as it was easier for them to install (and a pain in the bottom for us to remove). they are meant for holding sheets together, they wearn't meant for use in plasterboard as they don't expand enough to spread the load but they are used by many these days.

as to the worth, a bag of 50 is about a tenner.

 

[Paul200]

Rawlnuts. Used to sell them to people living in static caravan parks - good for fixing things onto cardboard walls!

https://www.rawlplug.co.uk/products/lig ... lexi-plug/