Water timer spare part??

[Chud]

I've got a holiday water timer (aqualin one), one of the 'nuts' that connects to the tap has split, it seems to be v similar to hozelock and gardena connectors in that there is an insert that screws onto the tap then this collar/nut is tightened on to it.

I can remove this piece but have no idea what to call it?

 

[CountryFan]

Looks like a nut forming part of the tap connector

 

[jj4091]

Possibly the top part of one of these. https://www.easygardenirrigation.co...ducts/claber-anti-leak-threaded-adaptor-99013
Or look at other connectors on this site https://www.easygardenirrigation.co.uk/collections/irrigation-fittings-and-adaptors