L.H. Dottie FWS38 Flat Washer, 7/16-Inch Inner Diameter by 1-Inch Outer Diameter by 1/16-Inch Thickness, 3/8-Inch Bolt, 100-Pack Stainless steel Invincibox up to 1/2-Inch Corrosion and chemical resistant 7/16-Inch inner diameter by 1-Inch outer diameter by 1/16-Inch thickness 3/8-Inch bolt