Nuts hold bolts in place. In combination nuts and bolts hold various other materials together -- such as the framework for a building or a piece of furniture.
Sometimes a locking washer is used to keep the nut and bolt from accidentally coming lose.
"Nuts and bolts" is a used to mean the basics, especially the simple, practical components necessary to make something work.
- Nuts, Bolts and Thingamajigs - The Foundation of Fabricators and Manufacturers Association, Intl.
- Has a student center, scholarships. "The mission of Nuts, Bolts and Thingamajigs is to nurture the tinkering spirit."