On 06/12/2020 23:13, John Rumm wrote:
On 06/12/2020 17:23, Dave Plowman (News) wrote:
...do the AF nut sizes on 15mm compression fittings vary by so much?
About
1.5mm between the smallest and largest here. All new. The threads seem
the
same - you can interchange the nuts.

If space is tight, you need a good spanner fit. And I hate adjustables.

The big forged "wrap around" compression spanners seem to work on all
the variations, but yup there is a fair amount of variation for a a
"standard" nut!

http://wiki.diyfaq.org.uk/index.php/...ession_spanner



Compression fittings are never done up 'tight' so even if the available
spanner is a bit slack, so what ?.

The pegeler website says tighten nuts less than 15mm by 1 complete turn
and 3/4 turn for 15mm and larger. That's after finger tightening.

There are always adjustables that set themselves, for those with
deep pockets -


https://uk.rs-online.com/web/p/wrenches/2012183/