Excerpt from Popular Mechanics: Shop Notes, Volume 16,
Setting a Lag Screw in a Hole Containing a Broken Point
When a lag screw breaks off in a hole and cannot be readily
removed, another screw may be set securely in the same hole by
the method illustrated. The threads are dressed off the new
screw with a file, and with a hacksaw the point is split a distance
equal to the depth to which it would normally enter the wood.
The points are then spread slightly and the screw driven home
with a hammer. When the points of the new screw strike the broken
piece they will spread out, taking a firm hold in the wood.
Care should be used to cause the new screw points to spread
with the grain of the wood to avoid splitting.
—Walter H. Wolf, Londonville, Ohio
Editor's Note: This is a reprint of an article published
in 1920. It describes what was recommended in accordance with
the knowledge and practices of the day. While reading it, please
consider this fact.