There are a few different types and they are not interchangeable.
That one looks like a water pipe fitting, they are usually in brass.
If you post a few dimensions I can check if I have anything that suits.
An alternative, if it's an odd ball, is screw it out and replace with a pair of standard claw fittings. I'd be fairly sure it's a standard thread.
more than likely half inch bsp mine all are even on the mobile comp if that's an oddball type just buy a pair of the standard ones there cheap[ as chips