All Macht Schnell Competition fasteners are hardened and tempered to strength class 10.9 or 10 according to DIN/ISO standard 898. They meet the statutory requirements of all countries - including the USA.
All studs/nuts feature a black plating process for OEM appearance.
Final inspections are not restricted to random quality checks. Every single fastener is tested to ensure compliance with specifications. Studs/nuts are also offered individually and should be replaced after every race season.
Competition Wheel Lug Nut Features:
- 10.9 Grade Strength Class for ultimate strength and safety - Black zinc coating for additional strength and corrosion/wear resistance