T-Works large surface serrated M4 wheel nuts
Made from the same high-quality titanium material as their screws, ball ends and turnbuckles are T-Works’ new serrated wheel nuts. The M4 fasteners offer a large contact surface for improved wheel support while the serrated portion helps the nut to stay in place even in the most severe racing action. The M4 wheel nuts come in packs of four.
Source: T-Works [rc-tworks.com]