- Also called worm. the helical ridge of a screw.
- a full turn of the helical ridge of a screw.
Origin of screw thread
First recorded in 1805–15
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for screw thread
In the same manner I close the screw-thread hole in gas tubes used for conducting steam.
On one end also a right-handed, and on the other a left-handed, screw-thread is turned.
A new vent can be readily put in, after getting out the old one, without injury to the screw-thread.
The screw-thread is then to be cleaned out, and the new vent-plug screwed in.
When we adopt a standard for screw-threads, a screw-thread is adopted which has a manifest advantage.
- the helical ridge on a screw formed by a die or lathe tool
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