Hosel is the the socket (or neck) in the head of a golf club into which the shaft is inserted.
hosel
What is the hosel size for Ben Hogan bh5 golf clubs? irons
El hosel
the serial number is stamped on the hosel of the driver (hard to find, but its there), the serial number for the irons set can be found on the hosel of the 6 iron.
Shank
This is the width of the bottom of the shaft, where it enters the hosel.
The socket is known as the hosel, it is where the head is connected to the shaft.
The hosel is the part between the club face and ferrule.
You could, but I wouldn't recommend it. You could use a belt sander to sand it down slightly, but not too much so you'd ruin it. You would honestly be better buying the proper shaft for the hosel.
Generally .370 for irons and .335 for woods these days.
The Hosel (one 's') is the socket or neck in the head of a golf club into which the shaft is inserted.