What is the technical term for this?

[Steve N]

Fail maybe on a screwdriver. On a wine bottle plug, ain't gonna happen

[Herb G]

Fail maybe on a screwdriver. On a wine bottle plug, ain't gonna happen

Exactly.

[iublue]

So you can sell different stoppers with different tops at the craft shows.
The pic I posted is straight from a pen turning supplier, and it's epoxied
into the stopper top so you can change either part to suite the customer.

Makes sense.  I only used Niles SS stoppers so all the stoppers were the same.

[EricU]

McMaster sells the insert in the OP for $3.84.  The "screw to expand" version, which seems like it would work fine in this applicaiton, is about 80 cents each in quantity of 10. https://www.mcmaster.com/#92395A031
Otherwise, the ebay option might be best.

I think I would get the tap for the externally threaded inserts.  Tap and glue them in.  One extra step that gets you same-day availability of parts.  You can buy the inserts at Lowes and HD.

[Woodshop]

I know it's a 3/8" X 16 TPI threaded insert. I have Googled until my fingers bled, but I can only find them at pen supply places for nosebleed prices. It's used for bottle stoppers.

Personally I would think out side the small box you created for yourself. The truth is you can epoxy almost any of the threaded inserts found anywhere into them and they would hold fine, perhaps better.
I would TAPE the flange end shut (up side down) on these and epoxy them in.  they would never come lose and costs about 31 cents each. now that's a bargain.

http://www.ebay.com/itm/3-8-16-Straight-Knurled-Rivet-Nut-Insert-Nutsert-Bronze-Tone-50pcs-/391618820036?hash=item5b2e4cf7c4:g:MZgAAOSwo4pYIwHz

If Not
Then you are left with large manufactures that make them for casting plastics like PVC .
No retail outlet options.
Here are a few you can track down.

http://www.yardleyproducts.com/product-tag/molded-in/

http://www.brass-parts-india.com/Fastners-Fixings/BSP-NPT-Threaded-Brass-Inserts.html

https://tappexthreadinserts.com/

[iclark]

Makes sense.  I only used Niles SS stoppers so all the stoppers were the same.

Ruth now has several different stopper shapes and some of them are available in either brass or stainless.

I especially like the flat-tipped shape that she introduced (last year, IIRC) that lets the stopper stand up by itself.

[Tynyyn]

I read through this entire thread and I too cannot figure out what the OP is going to do with this bottle stopper. To me it looks like a cap for an automobile tire. What on earth can this cap be used for in a wood working application? Inquiring minds want to know.

[MichaelMouse]

I read through this entire thread and I too cannot figure out what the OP is going to do with this bottle stopper.  To me it looks like a cap for an automobile tire.  What on earth can this cap be used for in a wood working application?  Inquiring minds want to know.

http://www.woodturningz.com/Threaded_Bot...rts_5_pack

Probably going to use them as written.

[Tynyyn]

I guess you can call me stupid, because I still don't know what it is to be used for. I appreciate MichaelMouse's response, yet this conundrum must be a regional thing. To me that pic in the link looks like a nut for a screw. How big is the stopper? Big enough to cap a bottle of wine? And if so, then why use a metal bottle stopper when a rubber one would be better.

Seriously, I'm not trying to be difficult, just trying to understand why a tire valve cap made of metal would be used as a bottle stopper.

[daddo]

No one gave you the technical name.

It's a  "Knurlecis Bottligistopis Thredalimus Capasus".



(That's weird- I got no spell check on "Thredalimus").