Rick, 
Copper alloy nails in a possible maritime/naval context would have several applications. These would include such things as usage around gunpowder, or in this case, more likely for securing copper sheathing to the exterior planking on a ship's hull. The length you stated is consistent with that usage. The majority of this type of fastener that I have seen have been British in origin. They are pretty standardized, and are cast with a stamped head. On the underside of the head is an impressed broad arrow denoting government ownership. The "US" stamp on your example is most interesting. Do you have a photo? 


Chuck Fithian 
----- Original Message ----- 
From: [log in to unmask] 
To: [log in to unmask] 
Sent: Monday, June 28, 2010 8:34:44 PM 
Subject: copper nail ID help 

Hello 

I need some help with the identification of two copper cut nails. They 
both have a "US" head stamp. One nail is similar to a shoe brad while 
the other is about 1.5 inches long. Both show no sign of wear. They 
were found in the same test pit along with fragments of pearl ware and 
cream ware. The site was near a ship building area since the 18th 
century and part of a US Navy base in the mid 19th century. Any ideas 
would be a great help. 

thanks, 

Rick Morris