Features Made of zinc plated carbon steel material, which provides strength and zinc cover offers 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 pi. Widely used in the home and office appliance, communication equipment, ship assembly and other machinery industry. Features: Made of zinc plated carbon steel material, which provides strength and zinc cover offers 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 pi. Widely used in the home and office appliance, communication equipment, ship assembly and other machinery industry. Specification: Condition: 100% Brand New Material: Carbon steel Surface treatment: galvanized Quantity: 5pcs Type & Hex Size & Weight: #01 M12*38, 19mm, 276g/9.7oz; #02 M12*50, 15mm, 170g/6oz (Optional) Package List: 5 x Hex Nut Package List