Cutlass Supreme V6-191 3.1L VIN M SFI (1997)
Wheel Fastener: Application and ID
Metric Wheel Nuts and Studs
Metric wheel nuts and studs are identified as follows: the wheel nut has the word "Metric" stamped on its face. The letter "M" is stamped into the end of
the wheel stud.
The thread size of the metric wheel nuts and wheel studs are indicated by the following example.
"M12 x 1.5"
M = Metric
12 = Diameter in millimeters
1.5 = Millimeters per thread (gap between)
