IR/L-NPT : Internal NPT (National Pipe Threads) full profile laydown threading inserts. ER/L - ground periphery and rake, ERB - with a chipformer and peripherally ground, ERM - with a chipformer. Used for steam, gas and water pipes.
Internal left-hand shown
  DesignationdiTPIlRXYGICATGIREMgiicTough ‹————› Hard
Grade & Vc
  06IR 27 NPT 3.9727.06.000.040.60.615901382 1IC228 
  08IR 18 NPT 4.7618.08.000.060.60.615996066 2IC228 IC908 
  11IR 27 NPT 6.3527.011.000.040.70.815901630 1IC250 
  11IL 18 NPT 6.3518.011.000.060.81.015902863 2IC228 IC908 
  11IR 18 NPT 6.3518.011.000.060.81.015994822 2IC250 IC908 
  11IL 14 NPT 6.3514.011.000.070.81.015995332 1IC250 
  11IR 14 NPT 6.3514.011.000.070.81.015902030 2IC250 IC908 
  16IR 27 NPT 9.5227.016.000.040.70.815996115 1IC908 
  16IR 18 NPT 9.5218.016.000.060.81.015902181 1IC908 
  16IRM 14 NPT   9.5214.016.000.050.91.215921256 With pressed chipformer. 4IC250 IC808 IC908 IC1007 
  16IRB 14 NPT   9.5214.016.000.070.91.215902601 With pressed chipformer. 1IC908 
  16IL 14 NPT 9.5214.016.000.070.91.215903353 1IC908 
  16IR 14 NPT 9.5214.016.000.070.91.215993037 4IC228 IC250 IC508 IC908 
  16IRM 11.5 NPT   9.5211.516.000.091.11.515921242 With pressed chipformer. 4IC508 IC808 IC908 IC1007 
  16IRB 11.5 NPT   9.5211.516.000.091.11.515902828 With pressed chipformer. 1IC908 
  16IL 11.5 NPT 9.5211.516.000.091.11.515990607 2IC250 IC908 
  16IR 11.5 NPT 9.5211.516.000.091.11.515996796 4IC228 IC250 IC508 IC908 
  16IRM 8 NPT   9.528.016.000.121.31.815903459 With pressed chipformer. 3IC808 IC908 IC1007 
  16IRB 8 NPT   9.528.016.000.121.31.815902827 With pressed chipformer. 1IC908 
  16IL 8 NPT 9.528.016.000.121.31.815903351 2IC250 IC908 
  16IR 8 NPT 9.528.016.000.121.31.815901938 2IC250 IC908 
  22IR 11.5 NPT 2M   12.7011.522.000.092.33.525902445 Multi-tooth 1IC908 
  27IR 11.5 NPT 3M   15.8811.527.000.093.35.535902444 Multi-tooth 1IC908 
  27IR 8 NPT 2M   15.888.027.000.123.15.025902448 Multi-tooth 1IC908 

For Insert Identification System, click on "More Info".
National Pipe Threads ANSI/ASME B1.20.1-1983.

For cutting speed recommendations, click on the required grade number related to specific item geometry