Disc with square hole?

[Bharpring]

Does anyone know what these things are? These were dug at completely separate sites.

 

[reale bill]

i'd say backing for drawer pulls

 

[Bharpring]

i'd say backing for drawer pulls

That’s exactly what I thought initially but how would they attach?

 

[HuntinDog]

I would say they are Conchos.
For a saddle, bridle or a belt.

 

[Charlie P. (NY)]

The fastener with the knob or loop goes through the center. Square shoulder so it helps to prevent the pull from unscrewing.

Look up "drop pull"

 

[Royn2751]

Does anyone know what these things are? These were dug at completely separate sites. View attachment 1569485View attachment 1569486View attachment 1569487

Brake shoe hold down spring caps

 

[Simon1]

Brake shoe hold down spring caps

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All those I ever encountered used a "slot". ( Good guess though )