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. nails (fasteners)
8. [nails by location or context]
9. roofing nails

Anotations

Scope note:

Roofing nails having a plain shank and a lead cap or washer, used for attaching corrugated or other metal roofing. The advantage of using lead washers is that they make a tight joint and prevent leaking and rusting at the nail hole; given that the lead washer is soft, it conforms to the curve and irregular surface of the metal.