Short Series S210T.
Used for milling keyways and slots. Bright finish. Flute type: 30° helix. Manufactured to BS 122: Part 4: 1980.
INCH TOLERANCES:
Diameter: up to 1/2". Tolerance: +0.0630, -0.0013.
Diameter:Over 1/2". Tolerance: +0.1250, -0.0015.