BSPT Threading Inserts

BSPT Threading Inserts

The BSPT thread form is a screw thread type that has been adopted internationally for interconnecting and sealing pipe ends by mating an external (male) with an internal (female) thread and was popular until the emergence of NPT thread forms in the oil and gas industry. The BSPT thread is a taper thread form whose diameter increases or decreases along the length of the thread.


Our range of BSPT (British standard pipe taper) 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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