4mm Aluminum Locknut (8) Black

Tuning Haus aluminum locknuts are made from a superior aluminum alloy and feature a high-quality nylon insert to secures the fastener to the screw, stud, or axle. Knurled versions securely grip to softer plastics, offering an ideal method to mount and secure touring car and drift wheels. Standard flanged fasteners feature a smooth face and are ideal for mounting shocks, wheels, or other applications where a knurled finish might scratch or harm carbon fiber or other surfaces.