an oar pin is called thole
An oar pin is also called a rowlock pin or a thole.
A thole is a hole for the pin of an oar in a row boat, so a thole filler is an oar.
Thole.
thole
The middle part of an oar is called a LOOM
Oar
A rowlock or oarlock (US) is a brace that attaches an oar to a boat. When a boat is rowed, the rowlock acts as a fulcrum, and, in doing so, the propulsive force that the rower exerts on the water with the oar is transferred to the boat by the thrust force exerted on the rowlock.
That's an oarlock.
The top of the pin is called the head of the pin.
It is called feathering your oar
There are 2 parts to an oar holder. The first part is the rigger which is attached to the side of the shell. The second part is the oar lock which swivels with the stroke and keeps the oar in place. This is mounted on top of the rigger.