18 Pr wood plug

[Gspragge]

Is any one familiar with this ?

It just drops in, the threads are worn and or it has shrunk
over the years so it just misses screwing in like a brass
shipping plug. I have the same which was used in a
French/American 75 which is smaller of course and took the
place of the fuze adaptor. It screws in properly but the wood threads
seem in better shape and were not quite so fine.

 

[starshell]

Bit of a long shot, but could it have been a pattern for the machining contractors to produce Brass plugs?
Cheers.

 

[mach1bang]

Is it not a wood pattern for casting in a sand mould?
they use to make wooden patterns to make all sorts of things.
I have one for a boat propeller,and a whitworth spanner.
Tim

 

[Gspragge]

There are two of the smaller plug , the other has apparently a C Broad arrow on it.
I was thinking of shipping plugs internal use or inter manufacturing plant ?

 

[gravelbelly]

Is it not a wood pattern for casting in a sand mould?
they use to make wooden patterns to make all sorts of things.
I have one for a boat propeller,and a whitworth spanner.
Tim

It is not usual to cast threads such as seen on the plug. The wood pattern would be cast a bit oversized and machined to size then the thread cut.

gravelbelly