sorry mike i wasnt very clear its the thread size for the pipe to feed the cylinder.I assume you mean the bolts which hold it on. If so they are a very odd size. They are 7 mm. They can be a bit hard to get hold of. I got mine from a shop that specialised in old Classic British motor bikes as they were used on some old Triumph bikes. The other source would be engineers supply shops via the internet. I think I have some somewhere in the garage. I will have a look later today.
Cheers
Mike
thank you mike i will order one from speedflow on mondayOK. I would think that they are 10mm x 1mm with a length of about 20 mm and for 3/16" pipe. You can get them from EBay or somewhere like Automec. Mick Sollis has probably got some at the workshop. Chris Cole will know exactly what they are and may have some in stock as he does the sleeved down slave cylinders that I have on my car.
Cheers
Mike