Be very careful here because you have not stated the material under bolt
compression. Depending on whether the material is wood, fiberglass, steel or
aluminum and the washer diameter or cap size used to distribute the
compression load, the answer could be quite different. The torque values or
stretch limits stated by others reflect the maximum elongation force
aacceptable by the bolt material without permanent bolt deformation and do
not consider potential crush limitations of the compression sandwich, which
could be much less.
Steve


wrote in message
...
Hi,
can anyone advise me on the roughly correct torque setting for
tightening the nuts on my keelbolts?
The studs are 20mm (thats about 13/16") in 316L plus one at
12mm(about 1/2")

The keel is 2 tonnes of lead if that makes any difference.

I'd hate at this stage (five long and bloody years) to over or
undertighten the bolts.

Thanks
Pete