almain rivet

noun1

1. •
   A kind of light, flexible plate armour first used in Germany around 1450, designed to be manufactured easily, especially en masse.

   • Two tithing corslets furnished, ij pair of almain rivets furnished. […] John Glasse, one almain rivet. John Chapman, one almain rivet. John Hurforde, with others[,] one almain rivet. — 1904