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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
  DesignationOrd IC TPI RE INSL PDY PDX HAND CICT  SC e AN CBMD CEDC ClssID CNC COATP D1 EPSR FTDZ GAN GRDMFG GTC HA HB IFS IH IIC ISCTMP ISYC NIS NT PDPT S S1 SSC  TCTR THFT TPT TTP UST GICATGIREMgiicTough ‹————› Hard
Grade & Vc
  06IR 27 NPT 1~3.9727.00.046.880.60.6R~1T~~0.00~999.0~Z~3~71DDA089C8D1E~3~999~999.00~60.0~~999.0~999~INSCPRFTHF~999.00~0.00~3~R~IS$$57059040035413~GEMLI16121010~202-08~1~1~999.00~999.00~999.00~6~999~NPT60~F~INT~C~5901382 1IC228 
  08IL 18 NPT 10~4.7618.00.068.240.60.8L~1T~~0.00~999.0~Z~3~71DDA089C8D1E~3~999~999.00~60.0~~999.0~999~INSCPRFTHF~999.00~0.00~3~L~IS$$43665230899704~GEMLI16121010~202-08~1~1~999.00~999.00~999.00~8~999~NPT60~F~INT~C~5902864 1IC228 
  08IR 18 NPT 10~4.7618.00.068.240.60.8R~1T~~0.00~999.0~Z~3~71DDA089C8D1E~3~999~999.00~60.0~~999.0~999~INSCPRFTHF~999.00~0.00~3~R~IS$$66402280471742~GEMLI16121010~202-08~1~1~999.00~999.00~999.00~8~999~NPT60~F~INT~C~5996066 2IC228 IC908 
  11IR 27 NPT 15~6.3527.00.0411.000.70.8R~1T~~0.00~999.0~Z~3~71DDA089C8D1E~3~999~999.00~60.0~~999.0~999~INSCPRFTHF~999.00~0.00~3~R~IS$$197153480986128~GEMLI16121010~202-08~1~1~999.00~999.00~999.00~11~999~NPT60~F~INT~C~5901630 1IC250 
  11IL 18 NPT 20~6.3518.00.0611.000.81.0L~1T~~0.00~999.0~Z~3~71DDA089C8D1E~3~999~999.00~60.0~~999.0~999~INSCPRFTHF~999.00~0.00~3~L~IS$$130663576841344~GEMLI16121010~202-08~1~1~999.00~999.00~999.00~11~999~NPT60~F~INT~C~5902863 2IC228 IC908 
  11IR 18 NPT 20~6.3518.00.0611.000.81.0R~1T~~0.00~999.0~Z~3~71DDA089C8D1E~3~999~999.00~60.0~~999.0~999~INSCPRFTHF~999.00~0.00~3~R~IS$$197153480986128~GEMLI16121010~202-08~1~1~999.00~999.00~999.00~11~999~NPT60~F~INT~C~5994822 2IC250 IC908 
  11IL 14 NPT 25~6.3514.00.0711.000.81.0L~1T~~0.01~999.0~Z~3~71DDA089C8D1E~3~999~999.00~60.0~~999.0~999~INSCPRFTHF~999.00~0.00~3~L~IS$$130663576841344~GEMLI16121010~202-08~1~1~999.00~999.00~999.00~11~999~NPT60~F~INT~C~5995332 1IC250 
  11IR 14 NPT 25~6.3514.00.0711.000.81.0R~1T~~0.00~999.0~Z~3~71DDA089C8D1E~3~999~999.00~60.0~~999.0~999~INSCPRFTHF~999.00~0.00~3~R~IS$$197153480986128~GEMLI16121010~202-08~1~1~999.00~999.00~999.00~11~999~NPT60~F~INT~C~5902030 3IC250 IC908 IC1007 
  16IR 27 NPT 30~9.5227.00.0416.490.70.8R~1T~3~0.00~999.0~Z~3~71DDA089C8D1E~3~999~999.00~60.0~~999.0~999~INSCPRFTHF~999.00~0.00~3~R~IS$$543619502068992~GEMLI16121010~202-08~1~1~999.00~999.00~999.00~16~999~NPT60~F~INT~C~5996115 2IC50M IC908 
  16IR 18 NPT 35~9.5218.00.0616.490.81.0R~1T~3~0.00~999.0~Z~3~71DDA089C8D1E~3~999~999.00~60.0~~999.0~999~INSCPRFTHF~999.00~0.00~3~R~IS$$543619502068992~GEMLI16121010~202-08~1~1~999.00~999.00~999.00~16~999~NPT60~F~INT~C~5902181 2IC50M IC908 
  16IRM 14 NPT   40~9.5214.00.0516.490.91.2R~1T~3~0.00~999.0~B~3~71DDA089C8D1E~3~999~999.00~60.0~~999.0~999~INSCPRFTHF~999.00~0.00~3~R~IS$$543619502068992~GEMLI16121010~202-08~1~1~999.00~999.00~999.00~16~999~NPT60~F~INT~C~5921256 With pressed chipformer 4IC250 IC808 IC908 IC1007 
  16IRB 14 NPT   45~9.5214.00.0716.490.91.2R~1T~3~0.00~999.0~B~3~71DDA089C8D1E~3~999~999.00~60.0~~999.0~999~INSCPRFTHF~999.00~0.00~3~R~IS$$543619502068992~GEMLI16121010~202-08~1~1~999.00~999.00~999.00~16~999~NPT60~F~INT~C~5902601 With pressed chipformer 1IC908 
  16IL 14 NPT 50~9.5214.00.0716.490.91.2L~1T~~0.01~999.0~Z~3~71DDA089C8D1E~3~999~999.00~60.0~~999.0~999~INSCPRFTHF~999.00~0.00~3~L~IS$$392552748973602~GEMLI16121010~202-08~1~1~999.00~999.00~999.00~16~999~NPT60~F~INT~C~5903353 1IC908 
  16IR 14 NPT 50~9.5214.00.0716.490.91.2R~1T~3~0.00~999.0~Z~3~71DDA089C8D1E~3~999~999.00~60.0~~999.0~999~INSCPRFTHF~999.00~0.00~3~R~IS$$543619502068992~GEMLI16121010~202-08~1~1~999.00~999.00~999.00~16~999~NPT60~F~INT~C~5993037 6IC228 IC50M IC250 IC508 IC908 IC1007 
  16IRM 11.5 NPT   55~9.5211.50.0916.491.11.5R~1T~3~0.00~999.0~B~3~71DDA089C8D1E~3~999~999.00~60.0~~999.0~999~INSCPRFTHF~999.00~0.00~3~R~IS$$543619502068992~GEMLI16121010~202-08~1~1~999.00~999.00~999.00~16~999~NPT60~F~INT~C~5921242 With pressed chipformer 4IC508 IC808 IC908 IC1007 
  16IRB 11.5 NPT   60~9.5211.50.0916.491.11.5R~1T~3~0.00~999.0~B~3~71DDA089C8D1E~3~999~999.00~60.0~~999.0~999~INSCPRFTHF~999.00~0.00~3~R~IS$$543619502068992~GEMLI16121010~202-08~1~1~999.00~999.00~999.00~16~999~NPT60~F~INT~C~5902828 With pressed chipformer 1IC908 
  16IL 11.5 NPT 65~9.5211.50.0916.491.11.5L~1T~~0.00~999.0~Z~3~71DDA089C8D1E~3~999~999.00~60.0~~999.0~999~INSCPRFTHF~999.00~0.00~3~L~IS$$392552748973602~GEMLI16121010~202-08~1~1~999.00~999.00~999.00~16~999~NPT60~F~INT~C~5990607 2IC250 IC908 
  16IR 11.5 NPT 65~9.5211.50.0916.491.11.5R~1T~3~0.00~999.0~Z~3~71DDA089C8D1E~3~999~999.00~60.0~~999.0~999~INSCPRFTHF~999.00~0.00~3~R~IS$$543619502068992~GEMLI16121010~202-08~1~1~999.00~999.00~999.00~16~999~NPT60~F~INT~C~5996796 6IC228 IC50M IC250 IC508 IC908 IC1007 
  16IRM 8 NPT   70~9.528.00.1216.491.31.8R~1T~3~0.00~999.0~B~3~71DDA089C8D1E~3~999~999.00~60.0~~999.0~999~INSCPRFTHF~999.00~0.00~3~R~IS$$543619502068992~GEMLI16121010~202-08~1~1~999.00~999.00~999.00~16~999~NPT60~F~INT~C~5903459 With pressed chipformer 3IC808 IC908 IC1007 
  16IRB 8 NPT   75~9.528.00.1116.491.21.7R~1T~3~0.00~999.0~B~3~71DDA089C8D1E~3~999~999.00~60.0~~999.0~999~INSCPRFTHF~999.00~0.00~3~R~IS$$543619502068992~GEMLI16121010~202-08~1~1~999.00~999.00~999.00~16~999~NPT60~F~INT~C~5902827 With pressed chipformer 1IC908 
  16IL 8 NPT 80~9.528.00.1116.491.31.8L~1T~~0.00~999.0~Z~3~71DDA089C8D1E~3~999~999.00~60.0~~999.0~999~INSCPRFTHF~999.00~0.00~3~L~IS$$392552748973602~GEMLI16121010~202-08~1~1~999.00~999.00~999.00~16~999~NPT60~F~INT~C~5903351 2IC250 IC908 
  16IR 8 NPT 80~9.528.00.1116.491.21.7R~1T~3~0.00~999.0~Z~3~71DDA089C8D1E~3~999~999.00~60.0~~999.0~999~INSCPRFTHF~999.00~0.00~3~R~IS$$543619502068992~GEMLI16121010~202-08~1~1~999.00~999.00~999.00~16~999~NPT60~F~INT~C~5901938 3IC50M IC250 IC908 
  22IR 11.5 NPT 2M   85~12.7011.50.0922.002.33.5R~2T~~0.00~999.0~Z~3~71DDA089C8D1E~3~999~999.00~60.0~~999.0~999~INSCPRFTHF~999.00~0.00~3~R~IS$$259021191977800~GEMLI16121010~202-09~1~2~999.00~999.00~999.00~22~999~NPT60~F~INT~C~5902445 Multi-tooth 1IC908 
  27IR 11.5 NPT 3M   90~15.8811.50.0927.503.35.5R~3T~~0.00~999.0~Z~3~71DDA089C8D1E~3~999~999.00~60.0~~999.0~999~INSCPRFTHF~999.00~0.00~3~R~IS$$115524468841968~GEMLI16121010~202-09~1~3~999.00~999.00~999.00~27~999~NPT60~F~INT~C~5902444 Multi-tooth 1IC908 
  27IR 8 NPT 2M   95~15.888.00.1227.503.15.0R~2T~~0.02~999.0~Z~3~71DDA089C8D1E~3~999~999.00~60.0~~999.0~999~INSCPRFTHF~999.00~0.00~3~R~IS$$115524468841968~GEMLI16121010~202-09~1~2~999.00~999.00~999.00~27~999~NPT60~F~INT~C~5902448 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

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