ST - MINI COLLET CHUCK WITH A FLAT A ➚ A .00020 58-60 HRc Ra 4µin (7) D1h6 D J L1 T L Ref Designation Range L1 L J D1 D T* Machine Type ST3/4 X1.496 ER16 MF .022-.396 1.496 1.024 M12X1 .750 .866 .669 ** ST3/4 X1.969 ER16 MF .022-.396 1.969 1.024 M12X1 .750 .866 .669 ** ST3/4 X2.756 ER16 MF .022-.396 2.756 1.024 M12X1 .750 .866 .669 ** ST3/4 X4.724 ER16 MF .022-.396 4.724 1.024 M12X1 .750 .866 .669 ** ST3/4 X5.512 ER16 MF .022-.396 5.512 1.024 M12X1 .750 .866 .669 ** ST1 X2.559 ER16 MF .022-.396 2.559 1.102 M12X1 1.000 .866 .866 *** ST1 X2.953 ER16 MF .022-.396 2.953 1.102 M12X1 1.000 .866 .866 ** ST1 X3.937 ER16 MF .022-.396 3.937 1.102 M12X1 1.000 .866 .866 ** ST1 X3.937 ER20 MF .041-.514 3.937 1.102 M14X1 1.000 1.102 .866 ** ST1 X5.512 ER20 MF .041-.514 5.512 1.102 M14X1 1.000 1.102 .866 ** * Wrench size ** Citizen *** Manurhin 827