Introduction: Use Coins As Washers
If you don't have washers on hand and just have to finish a project, you can drill holes into coins and use them instead. Use a dime or a penny for a small washer, and a quarter or half dollar to simulate a larger flange washer.
I wanted to finish building the brakes on my bike and I was no where near a hardware store so I just drilled through pennies. It worked great then, and the bike is still going strong!
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