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Unidentified Brass Plug


Well-Known Member

Would any members know what this brass plug may fit into :dry:

It's too small to be used as a nose plug in a 3" mortar.

It measures 2.5cm wide at the threads and is 5.5cm long.

The top has 1" I M T.J.R 6/40 stamped into it.

Any ideas what it may be used for ?


Invest :)

Pic 1