SD-3 Flat Bottom Counterbores
SD-3 Flat Bottom Counterbores are used to drill the pilot hole or clearance hole and counterbore a flat bottomed hole in one step. Great for lag screws, lag bolts, washer head screws, T-nuts & more.
Showing all 17 results
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32408 – 1/8″ x 3/8″ 3-Flute Flat Bottom Counterbore with TiN coated twist drill
$ 15.49 Add to cart -
32809 – 9/64″ x 7/16″ 3-Flute Flat Bottom Counterbore with TiN coated twist drill
$ 15.59 Add to cart -
33208 – 1/8″ x 1/2″ 3-Flute Flat Bottom Counterbore with TiN coated twist drill
$ 15.49 Add to cart -
33212 – 3/16″ x 1/2″ 3-Flute Flat Bottom Counterbore with TiN coated twist drill
$ 16.49 Add to cart -
33216 – 1/4″ x 1/2″ 3-Flute Flat Bottom Counterbore with TiN coated twist drill
$ 17.49 Add to cart -
34012 – 3/16″ x 5/8″ 3-Flute Flat Bottom Counterbore with TiN coated twist drill
$ 25.99 Add to cart -
34016 – 1/4″ x 5/8″ 3-Flute Flat Bottom Counterbore with TiN coated twist drill
$ 26.99 Add to cart -
34020 – 5/16″ x 5/8″ 3-Flute Flat Bottom Counterbore with TiN coated twist drill
$ 27.99 Add to cart -
34812 – 3/16″ x 3/4″ 3-Flute Flat Bottom Counterbore with TiN coated twist drill
$ 30.99 Add to cart -
34816 – 1/4″ x 3/4″ 3-Flute Flat Bottom Counterbore with TiN coated twist drill
$ 31.99 Add to cart -
34820 – 5/16″ x 3/4″ 3-Flute Flat Bottom Counterbore with TiN coated twist drill
$ 32.99 Add to cart -
34824 – 3/8″ x 3/4″ 3-Flute Flat Bottom Counterbore with TiN coated twist drill
$ 33.99 Add to cart -
36416 – 1/4″ x 1″ 3-Flute Flat Bottom Counterbore with TiN coated twist drill
$ 35.99 Add to cart -
36420 – 5/16″ x 1″ 3-Flute Flat Bottom Counterbore with TiN coated twist drill
$ 35.99 Add to cart -
36424 – 3/8″ x 1″ 3-Flute Flat Bottom Counterbore with TiN coated twist drill
$ 35.99 Add to cart -
36428 – 7/16″ x 1″ 3-Flute Flat Bottom Counterbore with TiN coated twist drill
$ 35.99 Add to cart -
36432 – 1/2″ x 1″ 3-Flute Flat Bottom Counterbore with TiN coated twist drill
$ 34.99 Add to cart
Showing all 17 results