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For a selection of basic naval terms, see the log and report glossary.

Results: drift pin

drift pin
nautical:  A conical-shaped pin gradually tapered from a blunt point to a diameter a little larger than the rivet holes in which it is to be used. The point is inserted in rivet holes that are not fair, and the other end is hammered until the holes are forced into line.
nautical:  When erecting the structure of a ship and rivet holes in the pieces to be connected are not concentric, the distance that they are out of line is called the drift. This should be corrected by reaming the holes, but common practice, which is prohibited in naval work, is to drive tapered pins, called "drift pins", into the unfair holes to force them into line.