Nautical Term: Countersunk hole
Definition of Countersunk hole
A countersunk hole is a type of hole that is tapered or beveled around its edge. This design allows a rivet or bolt head to seat flush with or below the surface of the object being bolted.
For example, on a sailboat, countersunk holes are used to secure the deck hardware such as cleats, winches, and deck lights. By using countersunk holes, the hardware sits flush with the deck, providing a clean and aesthetic appearance.
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