Feature 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.SpecificationFeatures: Made of zinc plated carbon steel material, high strength and good corrosion resistance. Hexagonal shape has 6 sides that gives a good granularity of angles for a tool to approach from. These hex nuts will be great replacement for industrial and construction fasteners. Used to fit bolts, studs or machine screws for fastening two parts together to make them one piece. Widely used in the home and office appliance, communication equipment, ship assembly and other machinery industry. Specification: Condition: 100% New Material: Carbon steel Surface treatment: galvanized Quantity: 10pcs 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) Package List: 10 x Hex Nut