diagonal pitch[dī′ag·ən·əl ′pich]
In rows of staggered rivets, the distance between the center of a rivet in one row to the center of the adjacent rivet in the next row.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
In riveted joints having two or more rows of staggered rivets, the distance from one rivet in one row to the nearest rivet in the next row.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.