What is a size 17 socket key?

Geuze

I am trying to put together a granite parasol base.

A bolt with carious washers pushes up through a hole in the base.

The shaft/end of the bolt then comes through.

A metal tube sits over the bolt.

The parasol is put into the tube.

The instructions say a size 17 socket key is required, to tighten the head of the bolt.

If we turn the tube to tighten, then the bolt also turns, so I know that is not really tightening it.

The problem is that the head of the bolt is in a recess of the base, difficult to get at.

I welcome any advice.

https://www.halfords.ie/tools/hand-tools/sockets-and-accessories/halfords-advanced-socket-17mm-1%2F2%22-drive-167700.html

If you buy a set, it comes with an extension for getting socket key up inside tight spaces.

https://www.espares.ie/product/es1772246?utm_source=google+shopping&utm_medium=shopping&utm_campaign=google+shopping&gclid=Cj0KCQjw78yFBhCZARIsAOxgSx1aJmi5hcOZd0RrQIvLmAI_08obBfJinNtuImP9z9XWo_CoMxKtjFEaAngqEALw_wcB

tDw6u1bj

By socket key do you mean allen key/hex key? if so, a 17mm goes with a 22mm bolt.

If you mean 17mm socket/spanner then that goes with a 10mm bolt.

Is that the info you're looking for? It's a little hard to tell. Using the word "key" really suggests an allen key, but a 10mm hex-bolt is way, way more common than a 22mm socket-bolt