Features: 1. Made of stainless steel material, which provides strength and offers good corrosion resistance in many environments. 2. Great for use in confined areas where you need hex flat head screw hammer head nut. 3. There are several common sizes that you can use for general purpose. 4. These screws and 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. Specification: Material: Stainless steel Color: As Pictures Show Quantity: 20pcs Optional Size: 6 * 15mm / 0.2 * 0.59in 6 * 20mm / 0.2 * 0.79in 6 * 25mm / 0.2 * 0.98in 6 * 35mm / 0.2 * 1.38in 6 * 40mm / 0.2 * 0.5in 6 * 45mm / 0.2 * 1.57in 6 * 50mm / 0.2 * 1.97in 6 * 60mm / 0.2 * 2.36in Package List: 20 * Screw and Nuts 1、Made of stainless steel material, which provides strength and offers good corrosion resistance in many environments. 2、Great for use in confined areas where you need hex flat head screw hammer head nut. 3、There are several common sizes that you can use for general purpose. 4、These screws and 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.