1Made of zinc plated carbon steel material, high strength and good corrosion resistance. 2Hexagonal shape has 6 sides that gives a good granularity of angles for a tool to approach from. 3These hex nuts will be great replacement for industrial and construction fasteners. 4Used to fit bolts, studs or machine screws for fastening two parts together to make them one piece. 5Widely used in the home and office appliance, communication equipment, ship assembly and other machinery industry.Features:_x000D__x000D_Made of zinc plated carbon steel material, high strength and good corrosion resistance. _x000D_Hexagonal shape has 6 sides that gives a good granularity of angles for a tool to approach from. _x000D_These hex nuts will be great replacement for industrial and construction fasteners. _x000D_Used to fit bolts, studs or machine screws for fastening two parts together to make them one piece. _x000D_Widely used in the home and office appliance, communication equipment, ship assembly and other machinery industry. _x000D__x000D_Specification:_x000D_Condition: 100% Brand New_x000D_Material: Carbon steel_x000D_Surface treatment: galvanized_x000D_Quantity: 10pcs_x000D_Type & Hex Size & Weight: #01 M8*20, 11mm, 88g/3.1oz; #02 M8*28, 10mm, 71g/2.5oz; #03 M8*30, 12mm, 167g/5.9oz; #04 M8*40, 12mm, 223g/7.9oz (Optional)_x000D__x000D_Package List:_x000D_10 x Hex Nut