Foden water level guage
 

Wanted, either a complete water guage or just the lower fitting, to replace one with the 1/2 inch BSP male thread broken off.
The body is approx. 32mm square.

John, I believe I have a full set, but they are likely going on my Fowler. Do you have any other fittings that may suit my job?

Why not drill and tap the fitting to accept a nipple that can be screwed in tight.
One of ours has been done like this, after the boilermakers snapped it off. Been on there best part of 25 yrs, and no problems.

Thanks to both of you.
Hedd, the only other water guage I have is flange mounted and, I think, too large for an engine. If your Fowler takes flanges I can measure it.
Trystan, that's the other alternative and I expect it can be done but I would prefer to find another bottom fitting if I can.