3/8" 60° Solid Carbide Countersink 12" Cobalt Aircraft Number Drills also known as machine countersinks

also known as machine countersinks

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

and other thin materials without the need for center punching

Goebel Part # ACA-66

They feature carbide cutting edges for wear resistance and a steel shank for toughness

3/8" 60° Solid Carbide Countersink 12" Cobalt Aircraft Number Drills also known as machine countersinksSpecifications SIZE 3 8" OVERALL LENGTH 2 3 4" MATERIAL CARBIDE FINISH UNCOATED (BRIGHT) SHANK DIAMETER 1 4" NUMBER OF FLUTES 6 SHANK TYPE ROUND CUTTING ANGLE 60 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.