Also found in: Thesaurus, Idioms.
nuts and bolts
The basic working components or practical aspects: "[proposing] lofty goals without specifying the nuts and bolts of how they are to be achieved" (Village Voice).
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.
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014