1、These hex nuts are made of zinc plated carbon steel material, which provides strength and zinc cover offers good corrosion resistance. 2、Hexagonal shape has 6 sides that gives a good granularity of angles for a tool to approach from. 3、There are many common size of hexagonal nut that you can choose for general purpose use. 4、These hex nuts will be great replacement for industrial and construction fasteners. 5、Used widely in the home and office appliance, communication equipment, ship assembly and other machinery industry. Features: These hex nuts are 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. There are many common size of hexagonal nut that you can choose for general purpose use. These hex nuts will be great replacement for industrial and construction fasteners. Used widely in the home and office appliance, communication equipment, ship assembly and other machinery industry. Specification: Material: Zinc plated carbon steel Size(Inner diameter, Optional): M16        16mm M18        18mm M20        20mm M22        22mm M24        24mm M27        27mm Quantity: 10pcs Weight: 265g~1390g / 9.3oz~49oz (approx.) Package list: 10 * Nuts