A hollow-faced punch for swaging rivet-heads.

(idiomatic) A person who has an obsession with the minutiae of their particular interest, especially in military and technology history. Anyone preoccupied with small distinguishing features between different items.

(construction) A pin with a relatively small but expandable head.

plural of pop rivet

A kind of light, flexible plate armour first used in Germany around 1450, designed to be manufactured easily, especially en masse.

plural of rivet counter

A tool for swaging rivet heads.

plural of rivet knob

A light portable furnace for heating rivets.

plural of rivet hearth