Wheel stud end markings?

[Tegger]

Did a bit of Googling but didn't come up with the relevant answers.

Suppose an automotive wheel stud has a big "M" stamped into its end (the free end, that is, not the end that gets pressed into the hub). What does that mean? Metric?

And would such a stud be OE to any automaker, or is it always aftermarket?

 

[Ken42]

I would assume it is a manufacturer s mark.?

 

[Chris142]

M is for motormite who makes lots of car parts

 

[Tegger]

Originally Posted By: Chris142
M is for motormite who makes lots of car parts

Sounds plausible, but the "M" doesn't look like the Motormite logos I'm finding online. I now realize that should have posted an image originally, so I'm posting one now.

This is a picture of the "M" on that stud:

 

[Zaedock]

M on the stud stands for "metric".

 

[cmorr]

Originally Posted By: Zaedock
M on the stud stands for "metric".


Correct

Fig. The word METRIC is stamped on the wheel retaining nuts (top arrow) and the letter M is stamped in the end of the studs (center arrow)

 

[97f150]

If I made wheel studs, I would put a marking like that, which may mean nothing just to make the ones that pay attention wonder about it.

 

[SS1970chrysler]

Half of mine have an "L" on them.

 

[Tegger]

Given that the stud in question did in fact have a Metric thread, I'll accept the explanation that the "M" stood for Metric. Thanks, all.

 

[cmorr]

Originally Posted By: SS1970chrysler
Half of mine have an "L" on them.

My 65 Fury shares the same "anomaly"

 

[eljefino]

Originally Posted By: SS1970chrysler
Half of mine have an "L" on them.

Half of mine have W's.

 

[larryinnewyork]

A Quality Inspector who worked for candy company that made M&M's candy got fired for rejecting the candys that had W&W on them.

 

[cmorr]

Originally Posted By: larryinnewyork
A Quality Inspector who worked for candy company that made M&M's candy got fired for rejecting the candys that had W&W on them.


He should have considering the ampersand is inverted