TAPER taps have a lead of eight threads and are used as a starting tap in difficult or high precision holes. Alpha Taper taps can be identified by the single ring on the shaft near the driving square.
Diameter: 12mm
Pitch: 1.5mm
Overall length: 70mm
Shaft Diameter: 9.0mm
Drive Square: 7.0mm
Tapping Drill Size: 10.50mm