#21 HSS Threaded Shank Countersink (1/2") 100° Single-Flute Countersinks and productivity

and productivity

this bit is made for durability in demanding applications

4-flute countersinks

The 4-Flute Cross Tip design reduces vibrations and allows for faster dust removal

while the high red hardness allows for drilling speeds up to 30% faster than standard M2 HSS

#21 HSS Threaded Shank Countersink (1/2") 100° Single-Flute Countersinks and productivitySpecifications PILOT SIZE #21 DECIMAL EQUIVALENT . 1590" BODY DIAMETER 1 2" MATERIAL HIGH SPEED STEEL THREAD SIZE 1 4 28 CUTTING ANGLE 100 SUGGESTED PACK QTY 1 Threaded countersink cutters can be used in adjustable or micro stop countersinking tools with a 1 4 28 threaded drive. They are made from high speed tool steel, precision ground to exact tolerances, and form relieved to ensure a 100 countersink angle concentricity.