#21 Pilot size, 5/32″ riveting, 1/2″ Diameter. 1/4×28 Thread. 3 flute, 120 degrees. Integral (fixed) pilot for cutting accuracy. High Speed Steel. Used with the ATS-133 countersink micro stop. NOTE: Cannot be used for steel – only aluminum and soft metals.
#21 Countersink Pilot Cutter 120°Out of Stock