The UNC thread form is most commonly used in America and is a standard set by the USA bodies ASME/ANSI. UNC threads are 60 degree imperial (inch) threads and are measured in TPI (threads per inch) and nominal diameter (e.g. 3/4" UNC). UNF thread form is a fine pitch UN thread.
All UNF/UNC hand taps from well known British brand Presto are available in sets or as individual taps (first/taper, second, plug/bottom hand taps). Hand taps are all straight fluted and can be used as machine taps if required. It is advisable to use all 3 taps however in lighter cutting materials, the second tap is often missed out. Order online and buy today for next day delivery.
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