5/16" HSS Threaded Shank Countersink (7/16") 12" HSS Aircraft Fractional Drills and productivity

and productivity

Our premium SDS Drill Bits are auto-weld manufactured with a Japanese-made carbide tip

These COHEX Series m35 5% cobalt drill bits are specifically designed for use in hand-held and impact drills

and other thin materials

SDS-Plus Carbide Tipped Drill Bits are designed for drilling stone or concrete

5/16" HSS Threaded Shank Countersink (7/16") 12" HSS Aircraft Fractional Drills and productivitySpecifications PILOT SIZE 5 16" DECIMAL EQUIVALENT . 3125" BODY DIAMETER 7 16" 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.