ST - MINI ER COLLET CHUCK A ➚ A .00020 58-60 HRc Ra 4µin L1 L Ref (1) D1 D J T Designation Range L1 L J D1 D T** ST1/2X4.000 ER11 M .022-.278 4.000 .734 - .500 .630 .433 ST5/8X2.500 ER11MF* .022-.278 2.500 .734 M8 .625 .630 .512 ST5/8X4.000 ER11 M .022-.278 4.000 .734 M8 .625 .630 .512 ST5/8X6.000 ER11 M .022-.278 6.000 .734 M8 .625 .630 .512 ST1/2X4.000 ER16 M .022-.396 4.000 1.480 - .500 .866 .433 ST3/4X2.500 ER16MF* .022-.396 2.500 1.000 M12 .750 .866 .630 ST3/4X4.000 ER16MF* .022-.396 4.000 1.000 M12 .750 .866 .630 ST3/4X6.000 ER16 M .022-.396 6.000 1.000 M12 .750 .866 .630 ST5/8X1.250 ER16 M .022-.396 1.250 1.378 M10 .625 .866 .669 ST3/4X2.500 ER20MF* .041-.514 2.500 1.562 M12 .750 1.102 .827 ST3/4X4.000 ER20 M .041-.514 4.000 1.562 M12 .750 1.102 .827 ST3/4X6.000 ER20 M .041-.514 6.000 1.562 M12 .750 1.102 .827 * With a flat ** Wrench size 824