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 6 results
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34020 – 5/16″ x 5/8″ 3-Flute Flat Bottom Counterbore with TiN coated twist drill
$ 29.39 Add to cart -
34820 – 5/16″ x 3/4″ 3-Flute Flat Bottom Counterbore with TiN coated twist drill
$ 34.64 Add to cart -
34822 – 11/32″ x 3/4″ 3-Flute Flat Bottom Counterbore with TiN coated twist drill
$ 34.64 Add to cart -
34824 – 3/8″ x 3/4″ 3-Flute Flat Bottom Counterbore with TiN coated twist drill
$ 35.69 Add to cart -
36420 – 5/16″ x 1″ 3-Flute Flat Bottom Counterbore with TiN coated twist drill
$ 37.79 Add to cart -
36424 – 3/8″ x 1″ 3-Flute Flat Bottom Counterbore with TiN coated twist drill
$ 37.79 Add to cart
Showing all 6 results