🔎 UNIDENTIFIED Any idea

[mmocha2905]

Any idea

 

Amazon Forum Fav 👍

Agony and Death on a Gold Rush Steamer: The Disastrous Sinking of the Side-Wheeler Yankee Blade - Grab it through Amazon!

[Red-Coat]

I think they're what we call 'tail rivets" on this side of the pond and they're generally used for securing roofing tiles or slates. They're usually copper and these days the heads are usually round, but older ones are often octagonal. They're secured as shown below:

 

[mmocha2905]

Thanks!