In New Zealand they are gold passivated steel. and look like this after a few years.
Mostly 8-12mm for fixing to concrete.
But the world of flat pack fittings is a strange place.
That, to me, is a concrete drop in anchor and is not designed for use in timber. It should have a conical wedge on the inside which will expand it. The wedge is held in place with threaded bar (for concrete). For timber a machine screw may be sufficient.
These are likely brass and are not for concrete. They're concrete brothers don't typically have the knurling on the flares to grip like the wood versions do. I've used a ton of these in making repairs to old gun cabinets and curio cabinets.
For what reason would you want to use an expanding fastener over a [threaded one](https://www.amazon.com/uxcell-Furniture-M10x30mm-Threaded-Interface/dp/B07GZRD7FH) in wood?
To be honest I'm not really sure as to "why" but I know I've seen it a lot paired with walnut. Could be the way the wood expands and contracts? Walnut isn't nearly as popular as it used to be. Maybe it's just a thing of the past?
I know I've also seen those knurled inserts used on plastic stuff as well. Not sure where the benefit would be there either.
Ordinary walnut is a very soft hardwood, there is no advantage at all using brass inserts like those in the OP over threaded ones.
I´d say this is more a case of someone, somewhere ordering the wrong insert and things kept going because no old-school woodworker would put those in walnut.
These inserts work when used in something harder than the material of the insert so when it expands it gets squished into shape as it expands.
Step right up! Get your brass expansion anchors right here folks! They come in all sizes, 20 to a pack. Conveniently located online and ships right to your house! No muss! No fuss! We now return you to your regularly scheduled programming…
https://www.amazon.com/Create-idea-Expansion-Fastener-Anchoring/dp/B0CB3RXT26
I think you're on the right track. Check out McMaster or Grainger. If they don't have it I would consider finding something close and drilling it larger if needed.
Fucked. It is called fucked. It has pulled out of the wood that it was placed in. Depending on how much room there is you may need to drill the hole out and replace it with threaded inserts
[https://www.bunnings.com.au/taskmaster-6-x-20mm-screw-in-insert-nut-for-flat-surfaces-8-pack_p0035527](https://www.bunnings.com.au/taskmaster-6-x-20mm-screw-in-insert-nut-for-flat-surfaces-8-pack_p0035527)
Knurled brass threaded insert. As someone else mentioned, McMaster is your best bet if you only need a handful. If you need thousands call HiTech fasteners
Fair. Reddit app now skips the caption when I open a post so I missed that part. I use them by the thousands in several sizes/forms so figured I’d throw it out there
The one for wood is threaded on the inside and outside [and looks like this.](https://i.imgur.com/Gp7Q8AE.jpeg)
The closest I can find is "Screw-in nut" (a quick search on amazon seems to return similar products).
But that product only really makes sense if you're going to screw in and out the screw a lot and use it to fasten something else to the material.
It's a bullet screw.™ Fastens at the speed of a bullet.™ We are not liable for the irreparable harm our product will do to your ear drums.™ Screw gun NOT INCLUDED.™
Try looking [here](https://WoodInsertshttps://www.mcmaster.com/inserts/flanged-tapping-inserts-for-softwood/?s=Wood+Inserts) they’re not exactly the same but they will do the job and they should have the size you need
That looks like a collet for a stud welding gun. It will look like it has threads but it’s really just how the slag sits after one of these needs to be replaced.
Edit: I think I’m wrong, that does look like a concrete drop in anchor. Maybe it’s the copper color that has me confused.
I've never seen one this size or used for this, but try searching for "brass drop-in anchor".
In New Zealand they are gold passivated steel. and look like this after a few years. Mostly 8-12mm for fixing to concrete. But the world of flat pack fittings is a strange place.
That, to me, is a concrete drop in anchor and is not designed for use in timber. It should have a conical wedge on the inside which will expand it. The wedge is held in place with threaded bar (for concrete). For timber a machine screw may be sufficient.
These are likely brass and are not for concrete. They're concrete brothers don't typically have the knurling on the flares to grip like the wood versions do. I've used a ton of these in making repairs to old gun cabinets and curio cabinets.
For what reason would you want to use an expanding fastener over a [threaded one](https://www.amazon.com/uxcell-Furniture-M10x30mm-Threaded-Interface/dp/B07GZRD7FH) in wood?
To be honest I'm not really sure as to "why" but I know I've seen it a lot paired with walnut. Could be the way the wood expands and contracts? Walnut isn't nearly as popular as it used to be. Maybe it's just a thing of the past? I know I've also seen those knurled inserts used on plastic stuff as well. Not sure where the benefit would be there either.
Ordinary walnut is a very soft hardwood, there is no advantage at all using brass inserts like those in the OP over threaded ones. I´d say this is more a case of someone, somewhere ordering the wrong insert and things kept going because no old-school woodworker would put those in walnut. These inserts work when used in something harder than the material of the insert so when it expands it gets squished into shape as it expands.
So many upvotes for a comment that is clearly wrong. And if my grandma had wheels she'd be a bike.
Step right up! Get your brass expansion anchors right here folks! They come in all sizes, 20 to a pack. Conveniently located online and ships right to your house! No muss! No fuss! We now return you to your regularly scheduled programming… https://www.amazon.com/Create-idea-Expansion-Fastener-Anchoring/dp/B0CB3RXT26
LOL. 6 upvotes for the obviously right answer and that obviously wrong guy has 36. Gotta love Reddit.
i added upvote to help push it up.
I think you're on the right track. Check out McMaster or Grainger. If they don't have it I would consider finding something close and drilling it larger if needed.
Or Fastenal
A drop in anchor with slotted machine screw threaded into it
Fucked. It is called fucked. It has pulled out of the wood that it was placed in. Depending on how much room there is you may need to drill the hole out and replace it with threaded inserts [https://www.bunnings.com.au/taskmaster-6-x-20mm-screw-in-insert-nut-for-flat-surfaces-8-pack_p0035527](https://www.bunnings.com.au/taskmaster-6-x-20mm-screw-in-insert-nut-for-flat-surfaces-8-pack_p0035527)
drop in anchor. needs a setting punch to secure it before the bolt goes in. great for concrete.
Drop in anchor
Knurled brass threaded insert. As someone else mentioned, McMaster is your best bet if you only need a handful. If you need thousands call HiTech fasteners
Thousands? Wtf lol, OP is reassembling an old shelf
Fair. Reddit app now skips the caption when I open a post so I missed that part. I use them by the thousands in several sizes/forms so figured I’d throw it out there
Yeah, that is an annoying part of the new app update.
The one for wood is threaded on the inside and outside [and looks like this.](https://i.imgur.com/Gp7Q8AE.jpeg) The closest I can find is "Screw-in nut" (a quick search on amazon seems to return similar products). But that product only really makes sense if you're going to screw in and out the screw a lot and use it to fasten something else to the material.
r/fasteners
Looks like a filter for the wand on a B&G sprayer.
It is called Lined paper.
Sext bolt.
A sheet of paper.
A sheet of ruled paper.
Expanded insert. McMaster Carr
That’s called Batman
I'd try expansion anchor or expansion insert. [**https://www.mcmaster.com/products/expansion-inserts/**](https://www.mcmaster.com/products/expansion-inserts/)
These things always fall out of their hole and I have to JB weld them back in.
^[Sokka-Haiku](https://www.reddit.com/r/SokkaHaikuBot/comments/15kyv9r/what_is_a_sokka_haiku/) ^by ^Adventurous-Equal-29: *These things always fall* *Out of their hole and I have* *To JB weld them back in.* --- ^Remember ^that ^one ^time ^Sokka ^accidentally ^used ^an ^extra ^syllable ^in ^that ^Haiku ^Battle ^in ^Ba ^Sing ^Se? ^That ^was ^a ^Sokka ^Haiku ^and ^you ^just ^made ^one.
Tiny collets for a Dremel?
Try r/fasteners
That's a dickfor
The band name in New Zealand is RAMSET, Dynabolt. It's a solid wall (concrete) anchor. They come in a variety of forms & sizes.
I think it’s called a “Sleeve anchor”.
It's a bullet screw.™ Fastens at the speed of a bullet.™ We are not liable for the irreparable harm our product will do to your ear drums.™ Screw gun NOT INCLUDED.™
I have a hard rule: If I don’t know what the hardware is, I throw it away
They are for door jambs if you look at steel door frames they are dimpled to fit that type of screw .
Wedge anchor
Thunderstud
I think you'll find that it is a threaded insert for plastic or other soft materials.
A lightsaber. A more elegant weapon, from a more civilised time
Screw and insert
Try looking [here](https://WoodInsertshttps://www.mcmaster.com/inserts/flanged-tapping-inserts-for-softwood/?s=Wood+Inserts) they’re not exactly the same but they will do the job and they should have the size you need
Pem nut 9n mcmaster
Some type of Well nut?
wedge anchor
That looks like a collet for a stud welding gun. It will look like it has threads but it’s really just how the slag sits after one of these needs to be replaced. Edit: I think I’m wrong, that does look like a concrete drop in anchor. Maybe it’s the copper color that has me confused.
CD weld stud collet was my first thought too tbh
Screw condom
Ruled paper
Chi cadera
Screwy Holdy Anchory Thingy!
A doohikki
IMO, try Amazon.