turnbuckle

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turn·buck·le

 (tûrn′bŭk′əl)
n.
A metal coupling device consisting of an oblong piece internally threaded at both ends into which the corresponding sections of two threaded rods are screwed in order to form a unit that can be adjusted for tension or length.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

turnbuckle

(ˈtɜːnˌbʌkəl)
n
an open mechanical sleeve usually having a swivel at one end and a thread at the other to enable a threaded wire or rope to be tightened
[C19: from turn + buckle]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

turn•buck•le

(ˈtɜrnˌbʌk əl)

n.
a rotating link or sleeve with internal screw threads at each end, used to tighten or connect the ends of a rod or cable.
[1695–1705]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.turnbuckle - an oblong metal coupling with a swivel at one end and an internal thread at the other into which a threaded rod can be screwed in order to form a unit that can be adjusted for length or tension
coupler, coupling - a mechanical device that serves to connect the ends of adjacent objects
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
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While you're at it, buy two 1/4-inch screw shackles and a 5/16-inch titanium drill bit.
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