Hello all,
I have come across an interesting issue when trying to find a replacement banjo bolt for my Lister D carburettor. The carburettors on my two Lister D carburettors use a banjo bolt with a 16 tpi / 55 deg thread and have a thread OD of 9/16". A replacement banjo bolt I got from the UK has a 19 tpi / 55 deg thread and an OG of 1/2"
My carburettors AMAL float bowl has an ID of 5/8" where the banjo bolt goes through the fuel transfer ring.
The UK banjo bolt only has an OD of 1/2" where it fits into the AMAL float bowl.

So my question is. When did Lister change the size of the inside diameter of the AMAL float bowl connection rings and the banjo bolts? Did they supply the Australian market with a different specification carby/float bowl?
Looking forward to your knowledge.
Cheers