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grub screw

British  

noun

  1. a small headless screw having a slot cut for a screwdriver or a socket for a hexagon key and used to secure a sliding component in a determined position

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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

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