[SEL] Tap & Die Set Help Needed--OT

[Dave Rotigel]

At 05:53 PM 3/12/2006, you wrote:
>Undersize or oversize taps will be marked with the nominal size and pitch, 
>followed by the amount the minimum pitch diameter is over or under basic. 
>For example, 1/2-13+.010".
>More here >
>http://www.unionbutterfield.com/tech/taps/Limits.asp

Hi derek,
         Thanks for that information. It was interesting! BUT what in the 
hell was the purpose of over/undersized taps and dies?
                 Dave