Drill holes in the middle and they become copper washers.
Photo by Fotolia/craig wactor
Just as I was about to finish up a deck project not long ago, I ran out of quarter-inch washers.
It was too late for me to run to town, so I drilled quarter-inch holes in several pennies. My make-do copper washers worked great and cost me about half of what store-bought steel washers do!
Carson City, Nevada