You are describing a 6-32 screw. Probably NC. (UNC) This is a very common
screw used in the USA. Hope this helps.
Jim


"N Cook" wrote in message
...
For period 1970 to 2000, whatever they are, they are not very common in
Europe. Coarser thread , diam for diam, than the usual European mm and BA.
Common sizes are about 0.132 in outside diam. , pitch 32 TPI, would they
be
UNC 6 ?
and 0.11 inch od and TPI about 40 , would they be 4 UNC ?

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