Wheel Stud / Lug Nut: Description and Operation

Metric Wheel Nuts and Bolts Description
Metric wheel/nuts and bolts are identified in this way:
^ The wheel/nut has the word Metric stamped on the face.
^ The letter M is stamped on the end of the wheel bolt.

The thread sizes of metric wheel/nuts and the bolts are indicated by this example: M12 x 1.5.
^ M = Metric
^ 12 = Diameter in millimeters
^ 1.5 = Millimeters gap per thread