ISO 3294 2nd Edition, August 1, 2016
Parallel shank countersinks for angles 60, 90 and 120 degrees inclusive
Additional Comments: ENGLISH
Published By:International Organization for Standardization (ISO)
This International Standard specifies the dimensions of parallel shank countersinks for angles 60°, 90° and 120° inclusive. It specifies dimensions in metric units only, these being regarded as the only recommended dimensions in the future, for countersinks with cutting diameters in the range 8 mm to 25 mm.
The dimensions apply only to tools made from high-speed steel. However, if the method of production allows, the shanks may be manufactured from a suitable alternative material, such as a carbon steel.
Unless otherwise indicated, the countersinks will be right-hand cutting.
Morse taper shank countersinks are the subject of ISO 3293.