Buffalo Nickel conchos with Chicago screw attachment

Same nickels; different fastener.  These are screw backs.  Minimum distance out is roughly 1/4".  Screw will stay threaded at 3/8" .... 1/8 inch expansion/compression.  Works with most all 3-4 oz leathers/

I have, at various times, cut out a leather washer to take up some of the first 1/4" if my project was thinner than the concho.  These mostly went on hat bands.  A few on holsters and belts.

These are pretty  "authentic"; they have not been polished so they have that real old school look.