"One of a series of short pieces of metal sliding in slot-holes formed in overlapping plates of armor,…
A large scale riveting illustration showing the length of the rivets for Osborn symbol for riveting.
A side view of Osborn, or standard, symbol for riveting.
The standard standard symbol for field riveting, or Osborn symbol for field riveting.
A conventional standard symbol for shop riveting known as Osborn symbol.