Larger wooden bungs

Bungs don't have to be perfectly round. Some of the holes (eg hull perforation) aren't round, so any plug that mostly fills the hole.
I've made some with just a plane and a lump of wood. They'd be perfectly round on a lathe, but these'll do.
In saying that, our boat has carried bungs for its 40 year life and not seen one used either...
 
I am surprised some people don't carry bungs. They are one of the cheapest safety items on a boat, and I have had to use one when the ball valve on the inlet for the fridge cooling water broke in half as I tried to close it.
 
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