french coupling

french coupling

[¦french ′kəp·liŋ]
(design engineering)
A coupling having both right- and left-handed threads.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Under French coupling rules, the Duke and Team Coolmore would probably have been disqualified.