Countersink Drill Bits | McMaster-Carr

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Countersink Angle

For Use On

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Body Diameter

Screw Size

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Shank Type

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Drill Tip Diameter

Hole Diameter

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Countersink Trade Size

REACH Compliance

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2,699 Products

Fabricating and Machining

Countersinks

Cut a cone-shaped opening in a hole to install flat head screws and rivets flush with the surface

Countersink Extensions

Countersink Extensions

Lengthen the reach of countersink heads

Counterbores

Enlarge the top of a hole to install socket head screws and wood plugs flush with the surface

Countersunk Hole Repair Tools

Countersunk Hole Repair Tools

Lightly shear off material to repair and clean out holes for machining between centers

Drill Bits

Create holes in metal, wood, plastic, concrete, and more

Burs

Cut excess material to smooth surfaces and holes using a rotary power tool like a die grinder

The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)