Hardware - what's it called

[DragonflyDH90]

OK, here's a question for you guys.

Looking for a name and source for the following;

Its kind of like a T nut but without the barbs, instead it has an externally threaded sleeve upon which a slim panel nut is screwed.
Another way of looking at it is like a Rivnut but externally threaded and retained with a thin panel nut.

There are the glue in variety but after a screw together type.

I have seen them used on thin composites and even some helmets for attaching other items but can't for the life of me find a source or name.

Any thoughts?

 

[littletootpilot]

 

[kjkimball]

 

[PittsDriver68]

 

[crankyklingon]

 

[crankyklingon]

 

[MTChris]

 

[PittsDriver68]

 

[DragonflyDH90]