ST-ER (collet chuck) : ER collet chucks with Straight shank
  DesignationStockDCONMSCSIDCONNWSDCONXWSLSLFBDJHFig.GICATGIREMgiic
  ST16X50ER11F Available16.000ER11 0.507.0050.018.5019.00M8 13.01 4507050 0
  ST20X50ER11F Available20.000ER11 0.507.0050.018.5019.00M10 17.01 4507051 0
  ST20X100ER11 Available20.000ER11 0.507.00100.018.5019.00M10 17.01 4507007 0
  ST20X150ER11 Available20.000ER11 0.507.00150.018.5019.00M10 17.01 4507053 0
  ST20X50ER16F Available20.000ER16 0.5010.0050.032.3028.00M12 19.01 4507001 0
  ST20X100ER16 Available20.000ER16 0.5010.00100.030.0028.00M12 19.01 4507002 0
  ST20X150ER16 Available20.000ER16 0.5010.00150.030.0028.00M12 19.01 4507003 0
  ST20X50ER20F Available20.000ER20 1.0013.0050.042.5034.00M12 22.01 4507004 0
  ST25X100ER20 Available25.000ER20 1.0013.00100.036.0034.00M16 22.01 4507005 0
  ST25X150ER20 Available25.000ER20 1.0013.00150.036.0034.00M16 22.01 4507006 0
  ST20X50ER25F Available20.000ER25 1.0016.0050.046.0042.00M12 28.02 4508001 0
  ST20X100ER25 Available20.000ER25 1.0016.00100.046.0042.00M12 28.02 4508012 0
  ST25X50ER25F Available25.000ER25 1.0016.0050.046.0042.00M16 28.02 4508002 0
  ST25X100ER25 Available25.000ER25 1.0016.00100.046.0042.00M16 28.02 4508013 0
  ST20X50ER32F Available20.000ER32 2.0020.0050.054.0050.00M12 36.02 4508003 0
  ST20X100ER32 Available20.000ER32 2.0020.00100.054.0050.00M12 36.02 4508014 0
  ST25X50ER32F Available25.000ER32 2.0020.0050.052.0050.00M16x2 36.02 4508004 0
  ST30X50ER32F Available30.000ER32 2.0020.0050.052.0050.00M18x1.5 36.02 4517073 0
  ST32X50ER32F Available32.000ER32 2.0020.0050.052.0050.00M18x1.5 36.02 4508006 0
  ST32X150ER32 Available32.000ER32 2.0020.00150.052.0050.00M18x1.5 36.02 4508017 0
  ST40X75ER32F Available40.000ER32 2.0020.0075.046.0050.00M22x1.5 44.02 4508008 0
  ST25X50ER40F Available25.000ER40 3.0026.0050.060.0063.00M16x2 45.02 4508005 0
  ST30X50ER40F Available30.000ER40 3.0026.0050.060.0063.00M18x1.5 45.02 4517074 0
  ST32X50ER40F Available32.000ER40 3.0026.0050.060.0063.00M18x1.5 45.02 4508007 0
  ST40X75ER40F Available40.000ER40 3.0026.0075.055.0063.00M22x1.5 45.02 4508009 0
  ST50X80ER40F Available50.000ER40 3.0026.0080.060.0063.00M28x1.5 54.02 4508010 0
  ST50X80ER50F Available50.000ER50 10.0034.0080.077.0078.00M36x1.5 58.02 4508011 0

F indicates a flat on the shank.