lead plug
lead plug
1. A small cylinder of lead which is forced into a hole in a masonry wall; serves as a point of attachment for a screw or nail driven into it.
2. A piece of lead between adjacent stones, for holding them together; formed by pouring molten lead in a groove cut in the jointing faces.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.