Cheers for your help guys. So you could be any cooler but the worst case is you would need to by a new thread, which wouldn’t be very costly anyway.
From looking at a lot of fitting i think that the sandwich plate is made up of 2 parts, a bolt that can be removed and the plate its self.
Look at the picture below
http://img171.auctions.yahoo.co.jp/users/0...045p4030016.jpg
The bolt and the plate or separated, so I assume that you could do this on most or all of the fitting.