Ever wonder why bolted connections in pressure-treated lumber often loosen? The wood fibers are not strong enough to prevent crushing, and the washers are too thin, so washers deform and joints eventually loosen. These 1/8” thick washers are just the ticket. Available in two diameters, they won’t deflect and distort like standard-thickness washers. Imported. ID: 11/32" x OD: 1-1/2" x 1/8" Thick.