Drill-Bit Countersinks | McMaster-Carr

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Countersink Angle

For Use On

System of Measurement

Body Diameter

Number of Flutes

Screw Size

Material

Shank Diameter

Overall Length

Countersink Type

Shank Type

Finish

Aluminum Titanium Nitride (AlTiN) Coated

Black Oxide

Carbide Tipped

Titanium Aluminum Nitride (TiAlN) Coated

Titanium Carbon Nitride (TiCN) Coated

Titanium Nitride (TiN) Coated

Drill Bit Size

Sold As

Length

Shank Material

Hole Diameter

For Cutting

Center Drill Trade Size

Number of Countersinking Ends

Manufacturer

Allied Machine & Engineering

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Yes

DFARS Specialty Metals

Exempt

Export Control Classification Number (ECCN)

EAR99

RoHS

Compliant

Compliant with Exemptions

REACH

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2,642 Products

Fabricating and Machining

Countersinks

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

1,686 products

Center Drills

Drill cone-shaped openings to mate with lathe centers or start pilot holes for screws

369 products

Counterbores

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

483 products

Countersunk Hole Repair Tools

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

7 products

Countersink and Counterbore Extensions

Lengthen the reach of threaded-shank countersinks

3 products

Counterbore Insert Holders

Pair with inserts to create flat-bottom holes

14 products

Countersink Drill Bits

A single bit drills and creates an angled surface so oval and flat screw heads sit flush

17 products

Counterbore Drill Bits

A single bit drills and creates a flat surface for the head of a socket head cap screw

23 products

Drill/Screwdriver Bits

Quickly change between drilling countersunk holes and driving screws

6 products

Burs

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

44 products