5/16" 120° HSS 6-Flute Chatterless Countersink 6" Cobalt Aircraft Fractional Drills Ideal for hard metals

Ideal for hard metals

reducing walking and ensuring cleaner holes

or inconel

Jobber (standard) length drill bit

SIZE 2" OVERALL LENGTH 4-3/8" MATERIAL HIGH SPEED STEEL FINISH UNCOATED (BRIGHT) SHANK DIAMETER 1" NUMBER OF FLUTES 6 SHANK TYPE ROUND CUTTING ANGLE 82° SUGGESTED PACK QTY 1

5/16" 120° HSS 6-Flute Chatterless Countersink 6" Cobalt Aircraft Fractional Drills Ideal for hard metalsSpecifications SIZE 5 16" OVERALL LENGTH 2" MATERIAL HIGH SPEED STEEL FINISH UNCOATED (BRIGHT) SHANK DIAMETER 1 4" NUMBER OF FLUTES 6 SHANK TYPE ROUND CUTTING ANGLE 120 SUGGESTED PACK QTY 1 6 flute countersinks, also known as chatterless countersinks, are designed to remove more metal compared to countersinks with fewer flutes. They are also more effective on harder materials and provide a more chatter free cut.