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expansion bolt

American  

noun

Building Trades.

  1. a bolt inserted into a hole drilled in masonry and mechanically expanded to serve as an anchor for shelves, timbers, etc.

expansion bolt British  

noun

  1. a bolt that expands on tightening, enabling it to be secured into an unthreaded hole

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The Orajet is a 22-inch tube of trans parent plastic with a detachable nozzle on one end and an expansion bolt on the other.

From Time Magazine Archive

For fastening any sort of work to stone or brick the clever expansion bolt, patented and manufactured by Isaac Church, of Toledo, is, on every count, the best device to specify.

From The Brochure Series of Architectural Illustration, Volume 01, No. 07, July, 1895 Italian Wrought Iron by Various

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Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.