Form A

  • Thread 6-8
  • Angle of chamfer 5°
  • Straight flutes
  • Recommended application for short through holes

Form B

  • Thread 3,5-6
  • Angle of chamfer 8°
  • Straight flutes with spiral point
  • Recommended application for through holes in medium or long chipping materials

Form C

  • Thread 2-3
  • Angle of chamfer 15°
  • Straight or spiral flutes
  • Recommended application for blind or through holes in short chipping materials

Form D

  • Thread 3,5-5
  • Angle of chamfer 8°
  • Straight or spiral flutes
  • Recommended application for blind holes with thread exit or through holes

Form E

  • Thread 1,5-2
  • Angle of chamfer 23°
  • Straight or spiral flutes
  • Recommended application for blind holes with short thread exit