L.H. Dottie FW14 Flat Washer, 5/16-Inch Inner Diameter by 3/4-Inch Outer Diameter by 1/16-Inch Thickness, 1/4-Inch Bolt, Zinc Plated, 100-Pack Zinc plated steel Invincibox up to 1/2-inch General use 5/16-inch inner diameter x 3/4-inch outer diameter x 1/16-inch thickness 1/4-inch bolt