Wheel Stud / Lug Nut: Description and Operation
Metric Wheel Nuts and Bolts DescriptionMetric wheel/nuts and bolts are identified in the following 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 the following example: M12 x 1.5.
^ M Metric
^ 12 Diameter in millimeters
^ 1.5 Millimeters gap per thread