In message , Jim K..
writes
RJH Wrote in message:
On 16/03/2019 09:28, Tim Lamb wrote:
snip

Plumbing fibre washers seem closely related to gold dust in terms of
availability.

When this cropped up before, I bought a pack from e-bay. Sadly the
larger sizes are too narrow to function properly.


Not cheap, but sets from Screwfix:

https://www.screwfix.com/p/fibre-rub...-210-pcs/70837



Toolsatan similar for £10 odd or eBay....

It is the sort of component you need to see before purchase:-(

I tried several plumbing outlets without success when I needed to fit a
parallel thread 22mm tap connector to a wall fitting.

--
Tim Lamb