L.H. Dottie FW8 Flat Washer, 3/16-Inch Inner Diameter by .4375-Inch Outer Diameter by 3/64-Inch Thickness, No.8 Bolt, Zinc Plated, 100-Pack Zinc plated steel Invincibox up to 1/2-inch General use 3/16-inch inner diameter x .4375-inch outer diameter x 3/64-inch thickness #8 bolt fastener size