Will someone please give me the correct name so I can identify a plumbing fitting i need.

 

I have two fittings each with a 1/4" BSP MALE thread.  I want to join them together.

 

I thought what I wanted was called a coupler, but searching for that does not find it.

 

I don't mind if it's brass or iron.

https://www.screwfix.com/p/female-socket-x/77539?tc=FB3&ds_kid=92700055281954514&ds_rl=1249404&gclid=Cj0KCQiAkNiMBhCxARIsAIDDKNUekQc2LPr0XYZlnZpBllCNOCnMqaZTU1AD7MwI9JqB8oeKR1N3QtsaAgMIEALw_wcB&gclsrc=aw.ds

 

?

Yep that's it. Thank you.

 

So it's a "socket"  As always it's a case of knowing the correct name.

Socket or coupler or even barrel. 

I had already tried and failed searching screweys for Union, coupler and barrel and failed.