Subject: Re: LG6 Carburettor - Threaded fuel inlet
Had an identical problem with my LG45 carburettor.
Tried a few solutions but without success so I purchased a new T4 float lid from Burlen Ltd and problem was solved.
In order to get a fuel tight seal with the fibre washer between banjo fitting and the float lid you had to tighten the banjo bolt to the extent that a thread repair was not advisable. But depends on what you use I guess. Sorry to say I don't know the thread type.
Hope this helps
Mark