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. [joints and joint components]
7. joints (connections)
8. [joints by material joined]
9. metal joints
10. metal seams

Anotations

Scope note:

Sheet metal seams comprising interlocking turnings on each of the two pieces, made in a manner so they lock together at the bottom. Such a seam is used to fasten bottoms to cylindrically shaped articles such as pails, tanks, and other items.