Jeff wrote:
>>You're approaching this the wrong way!
>>
>>Corrosion could result in a hex. size anything between what it was and
>>something much, much smaller. The only sensible way to do this is to
>>have a handful of sockets at hand and use that which has the tightest
>>fit (slightly hammered on tight is suggested).
>>
>>Remember that if you mess up the bolt head you will have a major
>>problem on your hands. Get it right first time and be prepared to
>>replace the bolts when you put it back together.
>>
>>Either buy several sockets, a mixture of imperial and metric even
>>Whitworth, or borrow some. Don't use the borrowed socket as a gauge,
>>go out and buy a similar sized one and use that. It's almost
>>guaranteed to be the poor fit.
>
>
> Thanks for the reply Dougal.
>
> The heads are not badly corroded, and there is no way a 15mm socket
> would hammer on, so before I go and get any new sockets, metric or A/F,
> I was just trying to find out what the satrting point was. It may just
> be that my 16mm is knackered!!
>
> Reagrds
> Jeff
The old hex headed ones were 5/8" A/F and the later ones 12pt 14mm A/F
I think.
Don't get hung up on whether it should be imperial, metric or
Whitworth - just make sure that it's tight! If that means a 'metric'
socket on an 'imperial' bolt so be it.
5/8", 3/8" Whit/BSF(Current series), 19/32", and 15mm would be
starters for the 5/8" hex.
14mm, 5/16" Whit/BSF(Current series) and 13mm would be starters for
the 12pt.
Your 16mm was too big for anything but you get the idea, a worn
undersize socket may be just what you need.