Found under truck on drivers side front? Where in the world did this come from?

An Allen wrench fits in center of stud


Sheared off from vibrations or maybe too tight ?

 

Vehicle?

HINT/TIP: Put your vehicle information (year, model, cab, trim, engine, wheelbase, _x4 drive, mileage, modifications, etc., etc.) in your signature -OR- provide it in your posting(s).
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2005 fx4 crew cab 4x4 all stock. No mods yet

 

This type of thread cracks me up.
Even more funny though is how often there is a real answer.

There is a 50% chance it's not even from your truck.

Parked in your garage?
In the street in front of your house?
In a parking lot?

 

Sway bar link missing an end?

Oh wait, it was on the ground? Then probably not from your truck.......

 

It looks like the top of the shock shaft and bolt ??

 

Sway bar end link since it has a hole for an allen wrench.

 

It looks like the wiggling pin out of a wobbling shaft.

 

Exhaust manifold stud.