Flat washers are great for adding resistance to your bolts and screws to prevent them from boring into the wood and weakening it. These Deck Plus SAE fine threaded washers are finished with a black epoxy coating and are designed to fit nuts and bolts of a similar size and finish. This black finish is designed to match the latest trends in black-finished hardware. When selecting a washer, be sure to pick 1 that matches the fasteners you are already using. Picking a different finish may cause a chemical reaction, weakening your fasteners over time.Washers are used to increase the pressure that a bolt or screw providesBlack epoxy coating is 2X more corrosion resistant than galvanized fastenersUse a washer that is the same finish as your other fastenersIntended for use in wood deck and fence constructionFor use with a 1/2 in. W bolt or screwItem sold individually at retail