Dave Plowman (News) wrote:

In article ,
charles wrote:
In article ,
john west wrote:
My ancient Tyford close coupled ceramic toilet cistern is held down to
the pan by two butterfly nuts that screw on to Brass Bolts extending
underneath the cistern.
Being about forty years old the diameter of the bolts are 'between' the
common 5M and 6M size. (i.e. bolt will not go into 5M nut and a 6M nut
is too big).
Would anyone know what kind of butterfly nut size and type of thread I
should be looking for? Also how best to try to get hold of a no longer
common sized one. Thanks.

Probaby a UNF size. In Guildford is an excellent shop that sell all sorts
of scews & nut in all sorts of threads. But they are probably nowhere near
you.

Not sure Unified was very common except in cars and so on. Things like
that if UK made were usually either BSF or BSW before metric.


BSA finally changed to UNF in 1969, and then promptly went bust ;(


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