Cobalt Threaded Shank Drill Bits

Cobalt Threaded Shank Drill bits (adapter drills) are made to the NAS 965 type “D” standard and are surface treated with Steam Oxide. Threaded shank drills are designed for use in tools with 1/4 “-28 female spindle and generally in confined areas.

All Cobalt adapter drills come standard with a 135° P-9 split point.
 
All Cobalt Threaded Shank Drills have a square shank for easy identification.

Designed for drilling hard, tough, high tensile strength materials in confined areas

Available in number and fractional sizes – Manufactured in the USA.