PREMIUM MATERIAL: Made of high quality carbon steel, these nuts have high hardness and long service life GOOD RUST RESISTANCE: surface is zinc plated for good rust resistance and better performance PACKAGE INCLUDED: There are a total of 50 pieces of nut that you can use for many projects EASY TO USE: They are simple to use and convenient for connecting aluminum profiles to other parts USES: These hammer head nuts are mainly used for European standard aluminum extrusion profiles Features: Made of high quality carbon steel, these nuts have high hardness and long service life. surface is zinc plated for good rust resistance and better performance . There are a total of 50 nuts that you can use for many projects. They are simple to use and convenient for connecting aluminum profiles to other parts . These hammer head nuts are mainly used for European standard aluminum extrusion profiles. Specifications: Material: carbon steel carbon Surface Finishing: Zinc Plating Color: Silver Type (Thread x Length x Width): EU30-M5x15.5x8 Quantity: 50pcs Package includes: 50pcs x Nuts