In article .com,
writes:
How important is it? I have managed to nadge about 4 now everytime I
screw and unscrew the tails into the tap body they seem to shred. Can I
just PTFE tape the ends instead?

Sounds like there's some burr on one of the parts.
I sometimes use a smear of silicone grease on O-rings
which slide on mating surfaces.

--
Andrew Gabriel