Overview Product Description USS Flat Washers in Hot Dip Galvanized Steel for 1/2" Bolts Outside Diameter: 1-3/8 inch Inside Diameter: 9/16 inch Thiockness: 0.1 inch Product Videos Custom Field Product Reviews Write a Review Write a Review × Flat Washers Hot Dip Galvanized Steel USS Standard Washers, 1/2" (Qty 100 ) Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *