200 3D printed Nut Bolt Washer detail parts.  The washer size is 4 mm which translates to 3.2 inches in F Scale and 3.6 inches in G Scale.  These are great detail parts for a timber structure where you want to simulate a bolted connection.  They are primed in dark brown.   Just add some rust colored chalk and they look great!  I also have a 5 mm version available.  Check my other listings.