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UN (UNC/UNF) Threading Inserts

Single Point Thread Turning Inserts for UNC & UNF Thread Forms

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. UN threading inserts can machine UNF or UNC full form threads.

Our range of UN (for UNC & UNF threads) single point threading inserts for lathe screw cutting is compatible with all major threading tool holders (with the exception of Sandvik).  Korloy threading inserts are stocked as standard in grade PC3030T, suitable for general machining on steel, stainless and cast iron.  We can also offer Vardex threading inserts from Vargus for more demanding applications (e.g. performance threading of stainless steel, titanium or aluminium).   

Size guide

  • 11ER/NR = Vardex 2ER/IR
  • 16ER/NR = Vardex 3ER/IR
  • 22ER/NR = Vardex 4ER/IR
  • 27ER/NR = Vardex 5ER/IR

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