Allen key

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Allen key

or

Allen wrench

n
(Tools) an L-shaped tool consisting of a rod having a hexagonal cross section, used to turn a screw (Allen screw) with a hexagonal recess in the head. A different size of key is required for each size of screw
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

Allen key

allen wrench
Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited
Translations

Allen key

[ˈælənˌkiː] Allen wrench (US) [ˈælənˌrentʃ] Nllave f (de) Allen
Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005
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References in periodicals archive ?
I have found that if I keep an Allen hex key in the airplane so that if the autopilot starts to climb and descend in altitude hold, I tighten up the Allen hex screw so the autopilot will stop the deviation from altitude for a while.
The selector is in the position where you'd find it on a Krieghoff, in front of the trigger blade, which is itself adjustable fore and aft using the supplied 1.5mm hex key. Pushing the selector to the left chooses the under barrel.
If the bushing is in a mechanically fixed position, any attempt to rotate it in the press with a hex key will be futile.
Spring hinges in aluminium from FDB Panel Fittings provide spring return with a stainless steel spring and an anodised finish in clear or black, while their friction hinges offer an adjustable resistance which retains the door or panel in the desired position - friction is adjustable by hex key. Raw aluminium, clear or black anodised finishes are offered, along with screw or stud fixing.
And consider picking up aHalfords Basic Tool Kit([pounds sterling]21.99), which contains useful tools perfect for simple bike maintenance, including tyre levers, screwdrivers, spoke key, hex key set, socket tools and spanners.
An interesting design feature lets you slide the buttons with a hex key to fit your grip style.
So I bought three--small, smaller, and smallest--remembering from my failed attempt to unscrew Baby Gaggia to choose the ones with the shortest handles--stubbies, as the store clerk called them--then asked, feeling rather smug, for the 5mm hex key. The store clerk seemed impressed.
PS14.99 each NINE-PIECE COLOURED HEX KEY SET In blue, red or yellow, made of hard-wearing chrome vanadium steel with a slip-resistant rubber coating.