trunnel


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treenail

A long pin of hardwood used in timber-framed houses to secure a joint between two planks or timbers; also called a trenail or trunnel.
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References in periodicals archive ?
The post and beam frame required no nails, but was fastened together with elegant mortise and tenon joints locked into place with stout wooden pegs called trunnels or "treenails.
Many of the ship's original locust treenails, or trunnels, are still working fasteners.
The Town is a lattice of crisscrossing diagonals, pinned together by trunnels (wooden pegs).