This Stainless 1/2 in MPT Plug is a good piece of hardware to keep around to add versatility to your brewing equipment.
You can use this Stainless 1/2 in MPT Plug for plugging the hole in your stainless vessels or for other applications around the brewhouse where you need to plug a 1/2 in hole. It is 1/2 inch MPT and hollow behind the threads.