
The nuts are made of high quality carbon steel. Nickel plated surface for good rust and oxidation resistance The set consists of 50 nuts, thread of your choice: EU20 -M5, EU30-M5, EU30-M6, conforms to European standard Easy to use and convenient for connecting aluminum profiles with other parts Suitable for European standard aluminum extrusion profiles: EU20 is used on profiles with a 6mm slot, while EU30 is used on profiles with an 8mm slot