1) Ship timber peg 2) Trenail 3) Trunnel 4) Wooden pin on a wooden ship 1) Trenail 2) Trunnel 
A treenail, also trenail, trennel, or trunnel, is a wooden peg pin, or dowel used to fasten pieces of wood together, especially in timber frame construction and wooden shipbuilding. It is an ancient technology. Covered bridges in the U.S. often use treenails as fasteners. Many such bridges are still in use. Locust is a favorite wood when making tr...
long wooden pin used to fix planks of ship to the timbers
long wooden pin used to fix planks of ship to the timbers
Wooden pin for attaching hull planking to the frames or for joining any two timbers.
• (n.) A long wooden pin used in fastening the planks of a vessel to the timbers or to each other.
(from the article `hand tool`) ...and pump casings or wheel hubs; special bits of many forms were designed for these purposes. The more common use of the auger or bit was in the ...
A treenail is a nail made of hard wood, as opposed to steel or iron.
[n] - a wooden peg that is used to fasten timbers in shipbuilding
trenail noun a wooden peg that is used to fasten timbers in shipbuilding; water causes the peg to swell and hold the timbers fast