Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Components (hierarchy name)
4. components (objects parts)
5. [components by general context]
6. fasteners
7. [bolts and bolt components]
8. bolts (fasteners)
9. [bolts by form]

Anotations

Scope note:

Bolt and nut assemblies used to fasten objects to a hollow wall or a wall accessible from only one side. The nut has pivoted wings that close against a spring when the nut end of the assembly is pushed through a hole and open on the other side.