Lead Caps?

[DenDiggz]

I?ve been finding quite a few of these recently near old colonial homesites.
Any ideas what they could be? They are small in size no bigger than 3/8” round.

 

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[PanhandleDiggy]

I?ve found a handful of those all in the same spot and it was across from 1800?s shotgun style houses in Pensacola.

 

[villagenut]

Nail heads

 

[mick56]

They look like caps that went on roofing nails. When installing a metal roof, you would pound the nail down and the lead would seal it against rain.