4-Flute Drill Bits | McMaster-Carr

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Aluminum Chromium Nitride (AlCrN) Coated

Aluminum Titanium Nitride (AlTiN) Coated

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Titanium Aluminum Nitride (TiAlN) Coated

Titanium Aluminum Silicon Nitride (TiAlSiN) Coated

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4,055 Products

Fabricating and Machining

Drill Bits

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

7 products

Drill Taps

Drill and thread holes with the same bit

15 products

Reamer Drill Bits

Drill and finish holes in one pass

22 products

Tap and Drill Bit Sets

Drill holes and cut internal threads in a variety of sizes

22 products

Taps

Cut internal threads for fasteners, pipe, conduit, and more

52 products

Countersinks

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

223 products

Counterbores

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

187 products

End Mills

Cut and shape material to create precise slots, grooves, and profiles

2,640 products

Router Bits

Attach to routers and CNC machines to cut grooves, chamfers, and other detailed shapes

1 product

Reamers

Finish holes to an exact size, correct misaligned holes, and remove burrs

894 products