Originally Posted By Graham, G4FUJ
They can work loose.
On my way to the Midland Section Driving Tests the other Sunday I felt something drop on my leg.
Couldn't see anything, until I got to the event, then found the brass(? mine's a much older car - no plastic nuts!)) knurled knut on the floor. Knew it was off the back of a gauge - just needed to find the right one, which didn't take long!
Have been along all the clocks (not that there's many in my car) and tightened the rest up. smile

Cheers,

Hi ,
Graham, as you cannot tighten hard these nuts, normally you have to fit special washers with a profile like a "S". They maintain a certain pressure and avoid the nuts to loose.
BR.
Daniel.