Features: _x000D_Made from high quality carbon steel, these nuts have high hardness and a long service life. _x000D_Surface is plated with nickel for good rust resistance and better performance. _x000D_There are total 50pcs nut that you can use for many projects. _x000D_They are simple to use and convenient to connect aluminum profiles to other parts. _x000D_These hammer head nut are mainly used for European standard aluminum extrusion profiles. _x000D_EU20 is used on profiles with 6mm slot, while EU30 is used on profiles with 8mm slot._x000D__x000D__x000D__x000D_Specifications: _x000D_Material: Carbon steel _x000D_Surface Finishing: Nickel plating _x000D_Type: EU20-M4, EU20-M5, EU30-M4, EU30-M5, EU30-M6 (Optional) _x000D_Quantity: 50pcs _x000D_ _x000D_Package Includes: _x000D_50pcs x Nuts 1Made from high quality carbon steel, these nuts have high hardness and a long service life 2Surface is plated with nickel for good rust resistance and better performance 3There are total 50pcs nut that you can use for many projects 4They are simple to use and convenient to connect aluminum profiles to other parts 5These hammer head nut are mainly used for European standard aluminum extrusion profiles