I used to use vaseline, but in the end plastic goes brittle with age heat
and temperature changes etc.
The only real fix for any kind of nut is to attempt to use all metal
fittings, but many do not like them or their expense.
Brian

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"jkn" wrote in message
...
Hi All
I have a ceiling light with 3x g9 bulbs. The glass shades are help on
using
a threaded nut which screws around the g9 lampholder. The nut has a
'cogged' or
splined outer and the fitting came with a (cheap, plastic) box spanner
affair
for undoing the nut.

Every time I have to take the fitting off I have trouble because (a) the
spanner
is so cheap, and (b) the nut is not a smooth fit on the lampholder.

This last time, the nut has finally broken in two, so I will have to find
an
alternative.

1) any suggested source for decent (or even semi-decent) such threaded
nuts
for g9 bulbholders? I assume the thread is standard for these.

2) similarly for a decent box spanner design...

3) could I use some sort of high-temperature grease to ease the fit of the
nut
onto the lampholder?

Thanks for any thoughts

jon N