nut plates source

[David.H]

Erich, ebay seems to refer to this sort of thing as an anchor nut. 2BA crop up from time to time but there are others out there at present. Maybe worth a search? These people, for example, call them Nut Plates.

http://www.nutplates.com/

Regards,
Stuart

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Also, these intrigued me

https://www.extensivepivot.top/nos-2ba-b...p-354.html

Regards, Stuart

The nut plate would be fine as long as the nut is a snug fit! They would be fitted using 1/8" blind (pop type) rivets I imagine, or tiny self tappers. There will be minimal load on the cage when tightening the screw...a different matter when the nut is rusted on as we all know! The 50's cage nuts were in a square cage spot welded on and were a delight to remove when rusted in (I remember my TR3A wings with affection -not!- only a couple out of dozens came free willingly!) As I was in the business I replaced them all with Stainless Hexagon shank Rivnuts into hexagon holes (we made a hexagon cutting tool!) and stainless bolts as well.