ISO 3293:2016规定了60°、90°和120°（包括90°和90°）莫氏锥柄埋头孔的尺寸。 它仅规定了公制单位的尺寸，这些尺寸被视为未来唯一推荐的尺寸，适用于切削直径在16 mm至80 mm范围内的埋头孔。 给出的尺寸仅适用于由高速钢制成的工具。然而，如果生产方法允许，柄可由合适的替代材料（例如碳钢）制造。 莫氏锥柄符合ISO 296。 除非另有说明，埋头孔应为右旋切削。 平行柄埋头孔是ISO 3294的主题。

ISO 3293:2016 specifies the dimensions of Morse taper 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 16 mm to 80 mm. The dimensions given 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. The Morse taper shanks are in accordance with ISO 296. Unless otherwise indicated, the countersinks will be right-hand cutting. Parallel shank countersinks are the subject of ISO 3294.