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): M2 2mm M2.5 2.5mm M3 3mm M4 4mm M5 5mm Quantity: 100pcs Weight: 14g~98g / 0.5oz~3.5oz (approx.) Package list: 100 * Nuts