LEEPO lead cap? artillery related?

[Steeltowndigger]

Any idea what this might be from? not far from a a battle in 1812.. only wording on it i think says LEEPO

 

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[Bruce R]

Looks like the hub of a potmetal pulley

 

[nhbenz]

Similar to a blade adapter from a lawn mower.

 

[Gambrinus]

I am fairly confident you have a zinc and aluminum alloy (often called pot metal) die cast part. This process started in 1914.

I'm not sure what the part was, except that it was meant to attach to a keyed shaft.