Tightening bolt for taps

[Arbu]

The taps on my kitchen sink have become very loose at the base and clearly some attachment underneath needs tightening. I can't actually get my head in far enough to see it, but I can take a photo and here it is:

Tap attachment

• Arbu
• 4 Mar 2017

I think it must be the long extending bolt that needs tightening. I can tighten it a bit with my fingers but it's not enough. So is there a tool that I should buy in order to tighten this? Access is really difficult.

Thanks.

 

[PrenticeBoyofDerry]

You need a tap backnut spanner set

http://www.screwfix.com/p/rothenberger-monoblock-tap-spanner-set/40102

 

[Burnerman]

There is a box spanner specially available to tighten that nut, but if you have a socket set then that would work too.
John
( See above )

 

[oilboffin]

You may need a deep socket because some threads are fairly long.Bob

 

[Arbu]

Thanks, that worked fine with the screwfix set. Fiddly though.