Rushton Turnbuckle

[Mark Giovannetti]

Looking for a couple Rushton floorboard turnbuckles, does anyone know where I might find some for sale?

 

[Dan Miller]

Hen’s teeth. Check with Robert Ross.

They used to be available back in the day in the same and similar form as storm window hardware.

 

[Dave Osborn]

Mark,
The correct term is turn button.
Try an internet search for vintage turn button.
Open images, and hardware similar to what you need appears. Most are cast iron, but did notice some brass, but it was mislabeled.

Good luck