Hillman Hot Dipped Washers, Rust-Resistant, Galvanized Flat Washers, 1/4-Inch, 811070 (100 Pack)
Used in applications with nuts and bolts. The flat washer provides a greater bearing surface which helps prevent a nut or bolt head from tearing through the material. Flat washers are commonly used in decks and fence building. The called out size is the inner diameter of the washer.