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
11. dovetail seams

Anotations

Scope note:

Dovetail seams in sheet metal, for joining collars to flanges, where the seam has a bead formed by means of a beading machine. This bead acts as a stop for the flange to rest upon and the tabs are bent over to hold the flange in place.