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: 5/16mm
- Pitch: 18mm
- Overall length: 53mm
- Shaft Diameter: 6mm
- Drive Square: 4.9mm
- Tapping Drill Size: 6.60mm