customer-service Help
  1. Home
  2. /
  3. Tools & Machining
  4. /
  5. Cutting Tools
  6. /
  7. Drill Bits
  8. /
  9. Threaded Shank Drill Bits
  10. /
  11. #21 Cobalt Long Threaded Shank Drill Bit Overall Length 2-1/8
Shop All Threaded Shank Drill Bits
Drill America

#21 Cobalt Long Threaded Shank Drill Bit Overall Length 2-1/8

product price: $2.79
/ea
Sold in multiples of 3 for $8.37
Free Shipping on orders over $50
Free 30-Day Returns

Key Features

  • Drill Bit Point Angle 135 Degrees
  • Drill Bit Material Cobalt
  • Drill Bit Finish Black Oxide
  • Shank Size 1/4"-28
  • Overall Length 2-1/8 in
See all product information

Product Information

Dimensions

Drill Bit Size #21
Shank Size 1/4"-28
Overall Length 2-1/8 in

Details

Drill Bit Point Angle 135 Degrees
Drill Bit Material Cobalt
Drill Bit Finish Black Oxide
Type Long
Flutes 2
Cutting Direction Right Hand
Point Type Split Point

Description

Threaded shank drills are type “D” adapter drills are made from M42 8% cobalt high speed steel are manufactured to NAS 965 Type "D" specifications with 135o heavy duty split point and surface treated for drilling hard, tough, high tensile strength materials. When drilling low tensile strength materials. When drilling low tensile strength materials, the Type "D" cobalt drill will have a significantly greater tool life than the NAS 965 Type B high speed steel adapter drill, resulting in a much lower cost per hole.

Ratings & Reviews

3 Reasons You Can Count On Us

  • Supplies for every job.

    Supplies for every job.

    10 million items and the exact one you need.

  • When you need it fast, count on Zoro!

    When you need it fast, count on Zoro!

    2 million products ship in 1 day.

  • Stretch your budget further.

    Stretch your budget further.

    Everyday low prices on the brands you love.

Explore More Products