7/8" 82° HSS 6-Flute Chatterless Countersink 12" Cobalt Aircraft Number Drills Diameter: 3/16″

Diameter: 3/16″

Round shank for use in a wide range of tool holding systems

and they provide a smooth finish on materials such as aluminum

Finish Detail: Zinc Yellow Trivalent Chromate Per ASTM-B-633 Type II

QTY 1 STE2 (3/16" - 1/2" x 16ths)

7/8" 82° HSS 6-Flute Chatterless Countersink 12" Cobalt Aircraft Number Drills Diameter: 3/16″Specifications SIZE 7 8" OVERALL LENGTH 2 3 4" MATERIAL HIGH SPEED STEEL FINISH UNCOATED (BRIGHT) SHANK DIAMETER 1 2" NUMBER OF FLUTES 6 SHANK TYPE ROUND CUTTING ANGLE 82 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.