Definition
The head of a solid rivet that is formed by the manufacturer before the rivet is installed. It is the finished, shaped end of the rivet as it comes from the factory, opposite the shop head that is formed by the mechanic during installation.
Plain English
The factory-made head on a rivet — the one already shaped when you pick the rivet up. The other end gets squashed into shape during installation.
Context Anchor
Seen in aircraft sheet-metal repair, rivet installation, and structural inspection discussions.
Derivation
Manufactured comes from the Latin manu (hand) and factus (made) — literally 'made by hand,' though now meaning factory-made. The point of the term is to distinguish the head that arrived already formed from the one the mechanic forms on the job.
Why Pilots Care
Mechanics and inspectors need to identify the manufactured head because rivet type, size, and material are often marked on it. It also tells you which end was driven and which end was bucked, which matters when inspecting installation quality.
Intuition Check
Do not assume the manufactured rivet head is the head made during installation. It is the head that was already on the rivet before installation began.
Example Sentence 1
Before driving the rivet, the mechanic seated the manufactured head flush against the skin and bucked the opposite end to form the shop head.
Example Sentence 2
On the exterior skin, the manufactured rivet head faces outward so the shop head can be formed inside the structure.