DIN 69063-1
DIN 69063-1 Machine tools - Tool receiver for hollow taper shanks - Part 1: For Type A and Type C according to DIN 69893, connecting dimensions
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 08/01/2008
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 08/01/2008