carriage bolt n. A type of bolt threaded only at the end opposite the head, used mostly for fastening pieces of timber together, and inserted into pre-drilled holes.
... to prevent splitting. If splitting has actually occurred, the weaker limb should be cut away and the other staked if necessary until it gets strength and stiffens. If the limbs are rather large they can be drawn up and a 3/16 inch carriage bolt put through to hold both in place; but this is a poor way to make a strong tree. We should cut out all splits and do the best we could to make a tree out of what is left. Then do not make ... — One Thousand Questions in California Agriculture Answered • E.J. Wickson
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