This International Standard specifies the dimensions of tapered die-sinking cutters with plain parallel or parallel flatted shanks. These cutters are in particular intended for directly obtaining clearances of moulds, patterns and dies, when these exceed 2° 52’. This International Standard applies to flat-end cutters and bal I-nosed cutters. Three types of cutters are standardized : short type, medium type, and long type in conjunction with the useful length I. Parallel shanks are in accordance with ISO 3338/I and II.