Some farm equipment part?

[Reverend B*IKE*]

Found this on or near a school property. I figure it may be a piece of the lawn maintenance equipment . If you look hard enough you can see a bulldozer. A little help wouldnt hurt.
thanks
I guess solved!

 

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[allan]

looks like a wagon pin for a farm tractor

 

[Tnmountains]

Yep a lynch pin also used a lot on a three point hitch. Probably to pull a bush hog.