Flat washers are used to be positioned under the head of a bolt or nut to give a smooth bearing surface. The Homesmiths GI Flat Washer has been designed to provide the perfect bearing surface. The quality of the washer was manufactured to ensure its use as a spacer by increasing the surface area. Made of galvanized iron the washer is round with a 10mm diameter. The coated surface makes the washer corrosion resistant as these washers can be used for studs, nuts, structural screws that are used for construction and building applications. .(1)Galvanized Iron Washer (2)Shape: Round (3)Diameter: 10mm (4)Mechanical coated (5)Corrosion resistant.