Here is a CVA Kentucky Long rifle Stock Joining pin. It will fit CVA Traditions and Jukar rifles. It is .156 in diameter and 1 3/4" long.
It might have some marks or tarnish from storage.
This is a stock picture, yours will be the same.
It comes with what you see in the pictures.
NOTE: This part goes on a muzzleloader, blackpowder gun.