Flat washers come in various sizes for one screw diameter, from tiny to extra-large. The main role of flat washers is to increase the size of a screw's bearing surface area and reduce the surface pressure applied on the fastened object.
Here are some of the features of flat washers: - Used to distribute loads of threaded bolts, screws and nuts evenly as the fastener is tightened - Durable and long-lasting assembly - Corrosion-resistant - Spacing These are the common features of flat washers.