A stave. And a barrel is just one size of cask (cask is the general word).
The sides of wooden barrels are made of 'staves'
STAVE
A rib is a raised strip of metal that runs the length of the top of the barrel. A ventilated rib is not solid, but has slots beneath the solid strip.
The narrowest strip of Mexico is called Baja California.
A strip of two different meals joined together is called a bimetallic strip.
a dot and strip of a leopard
The spelling "bead" is a small object strung as jewelry, a wooden border strip, or a line of material as in caulking.
magnet strip
The small round part is called the tender loin. The top part with the bone left on is called the KC strip (Kansas City strip). If the bone is removed, then it is called the NY strip (New York strip). PCH Tenderloin and strip loin
That can be the carpet edging strip, the fastening strip, carpet plating strip for a few names.
Peninsula .
At the end of the barrel there are a series of threads. First and foremost the threads have to match. If they do not, you could strip the threads and make the marker useless. From here simply screw the barrel in till it becomes snug.