thumb|Oak treenails for pinning a wooden structure together. A used one (front center) demonstrates permanent deformation from the forces that bore on it
thumb|Oak treenails for pinning a wooden structure together. A used one (front center) demonstrates permanent deformation from the forces that bore on it
A treenail, also trenail, trennel, or trunnel, is a wooden peg, pin, or dowel used to fasten pieces of wood together, especially in timber frames, covered bridges, wooden ship- and boat-building. It is driven into a hole bored through two (or more) pieces of structural wood (mortise and tenon).
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).