This is for one box which contains 100 washers per box. A penny washer (also known as a repair washer) is a large-diameter washer with a relatively small central hole. They are used to spread the load of a fastener across a wider surface area, which helps prevent damage to softer materials and enhances the fastener��s stability. Penny washers get their name from being wide and flat, somewhat like an old penny coin.
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