GTI ER-ST(TAPPING) : DIN 6499 ER tapping attachments with straight shanks.
  DesignationSSCSITap minTap maxd mind maxD3D1LL1L2FlfFlbkgGICATGIREMgiic
  GTI ER11 ST16X150 M 16ER11M2M70.507.0016.0--19.0150.006.03.00.1804601955 0
  GTI ER16 ST20X80 20ER16M3M100.5010.0028.029.5041.6024.680.008.03.00.3004601956 0
  GTI ER20 ST20X80 20ER20M4M141.0013.0034.033.5049.0028.080.008.03.00.3504601957 0
  GTI ER25 ST25X80 25ER25M5M161.0016.0042.040.5053.0032.080.009.04.00.5504601958 0
  GTI ER32 ST25X80 25ER32M6M201.0016.0050.056.5077.2032.080.009.04.01.1604601959 0
  GTI ER40 ST32X80 32ER40M6M272.0020.0063.056.5095.2051.080.009.04.01.6604601960 0