customer-service Help
  1. Home
  2. /
  3. Tools & Machining
  4. /
  5. Cutting Tools
  6. /
  7. Porting Tools & Counterbores
  8. /
  9. Counterbores
  10. /
  11. 1/2"x5/16" Pilots for Counterbore
Shop All Counterbores
Drill America

1/2"x5/16" Pilots for Counterbore

product price: $9.15
/ea
Sold in multiples of 2 for $18.30
Free Shipping on orders over $50
Free 30-Day Returns

Key Features

  • Bore Dia. 9/32"
  • Overall Length 2-1/8"
  • Shank Dia. 5/16"
  • Shank Type Round
  • Size- Decimal 0.5 in
See all product information

Product Information

Dimensions

Bore Dia. 9/32"
Overall Length 2-1/8"
Shank Dia. 5/16"
Size- Decimal 0.5 in
Shank Size 5/16"

Details

Shank Type Round
Finish Uncoated (Bright)

Description

Counterboring is the enlargement of a portion of a hole that has previously been formed. If the counterbored portion is shallow (1/8" or less), the operations is usually known as spot-facing; for example, a flat seat for a bolt head or nut. If, on the other hand, the hole is enlarged to a considerable depth, it is designated as counterboring. These counterbores are made of two-piece construction, having an integral shank and counterbore-cutter, and a pilot that is interchangable, which provides flexibility in the use of the tool.

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