Countersink Bits | McMaster-Carr

Filter by

Countersink Angle

For Use On

System of Measurement

Body Diameter

Number of Flutes

Shank Diameter

Screw Size

Shank Type

Hole Diameter

Material

Sold As

Overall Length

Finish

Aluminum Titanium Nitride (AlTiN) Coated

Black Oxide

Carbide Tipped

Titanium Aluminum Nitride (TiAlN) Coated

Titanium Carbon Nitride (TiCN) Coated

Titanium Nitride (TiN) Coated

Uncoated

Number of Countersinking Ends

Shank Material

Drill Bit Size

Drill Tip Diameter

Body Diameters Included

Pilot Diameter

Export Control Classification Number (ECCN)

REACH

Flute Type

DFARS Specialty Metals

Exempt

RoHS

Compliant

Compliant with Exemptions

For Cutting

Countersink Trade Size

2,604 Products

About Countersinks

Choose the right countersink angle, body diameter, and number of flutes for your application.

Countersinks

For Cutting Screw Holes

Countersinks for Screws

Cut a cone-shaped opening in a hole to install your flat-head screw flush with the surface

530 products

Smooth-Finish Countersinks for Screws

Make smooth, uniform cuts without stopping to clear chips

18 products

Fluteless Smooth-Finish Countersinks for Screws

The hollow body minimizes vibration while lifting chips out of the hole for a smooth, accurate finish

23 products

Fluteless Smooth-Finish Countersinks with Pilot for Screws

The pilot guides the cutting edge straight into the hole for an accurate cut on the first try

5 products

Precise-Cutting Countersinks for Screws

Cut to ultratight tolerances when accuracy is critical

24 products

Drill-Point Countersinks for Screws

Drill and countersink a pilot hole without changing tools

35 products

Hex-Bit Countersinks for Screws

Pop into tools that accept 1/4" hex bits for a secure hold and stable cut

6 products

Long-Reach Countersinks for Screws

Cut from around twice the distance of our standard countersinks

18 products

Two-Piece Long-Reach Countersinks for Screws

Create a custom-length countersink for access to hard-to-reach holes

7 products

Carbide-Insert Countersinks for Screws

Replace dull blades to countersink hundreds of holes with the same tool

11 products

Reverse Countersinks for Screws

If an obstruction blocks the hole, countersink from the reverse side instead

14 products

Countersinks with Two Countersinking Ends for Screws

When one end starts to wear, flip the tool around for a fresh cutting edge

45 products

Fluteless Smooth-Finish Countersinks with Two Countersinking Ends for Screws

When one end starts to wear, flip the tool around for a fresh cutting edge

4 products

Drill-Point Countersinks with Two Countersinking Ends for Screws

When one end starts to wear, flip the tool around for a fresh cutting edge

16 products

Drill-Bit Countersinks for Wood and Plastic

Drill and countersink holes of different depths without changing tools

63 products

Quick-Change Hex Drill-Bit Countersinks for Wood and Plastic

Pop into a hand-driven tool to drill and countersink a hole in a single step

10 products

Countersink Sets for Screws

Cut cone-shaped recesses for a range of screw-head diameters

34 products

Smooth-Finish Countersink Sets for Screws

Make smooth, uniform cuts without stopping to clear chips

2 products

Fluteless Smooth-Finish Countersink Sets for Screws

The hollow body minimizes vibration while lifting chips out of the hole for a smooth, accurate finish

2 products

Fluteless Smooth-Finish Countersink Sets with Pilot for Screws

The pilot guides the cutting edge straight into the hole for an accurate cut on the first try

1 product

Hex-Bit Countersink Sets for Screws

Pop into tools that accept 1/4" hex bits for a secure hold and stable cut

1 product

Countersink Hand Tools

Countersink, chamfer, and deburr in a single pass

6 products

Drill-Bit Countersink Sets for Wood and Plastic

Drill and countersink holes of different depths without changing tools

4 products

For Cutting Rivet Holes

Countersinks for Rivets

Cut a cone-shaped opening in a hole to install your rivet flush with the surface

372 products

Smooth-Finish Countersinks for Rivets

Make smooth, uniform cuts without stopping to clear chips

18 products

Fluteless Smooth-Finish Countersinks for Rivets

The hollow body minimizes vibration while lifting chips out of the hole for a smooth, accurate finish

4 products

Precise-Cutting Countersinks for Rivets

Cut to ultratight tolerances when accuracy is critical

12 products

Drill-Point Countersinks for Rivets

Drill and countersink a pilot hole without changing tools

20 products

Two-Piece Long-Reach Countersinks for Rivets

Create a custom-length countersink for access to hard-to-reach holes

5 products

Carbide-Insert Countersinks for Rivets

Replace dull blades to countersink hundreds of holes with the same tool

8 products

Reverse Countersinks for Rivets

If an obstruction blocks the hole, countersink from the reverse side instead

14 products

Countersinks with Two Countersinking Ends for Rivets

When one end starts to wear, flip the tool around for a fresh cutting edge

32 products

Fluteless Smooth-Finish Countersinks with Two Countersinking Ends for Rivets

When one end starts to wear, flip the tool around for a fresh cutting edge

1 product

Drill-Point Countersinks with Two Countersinking Ends for Rivets

When one end starts to wear, flip the tool around for a fresh cutting edge

13 products

Countersink Sets for Rivets

Cut cone-shaped recesses for a range of rivet-head diameters

17 products

Smooth-Finish Countersink Sets for Rivets

Make smooth, uniform cuts without stopping to clear chips

2 products

Fluteless Smooth-Finish Countersink Sets for Rivets

The hollow body minimizes vibration while lifting chips out of the hole for a smooth, accurate finish

1 product

For Cutting Lathe Center Holes

Countersinks for Lathe Centers

Cut a profiled recess to keep your workpiece aligned as it spins

262 products

Smooth-Finish Countersinks for Lathe Centers

Make smooth, uniform cuts without stopping to clear chips

9 products

Fluteless Smooth-Finish Countersinks for Lathe Centers

The hollow body minimizes vibration while lifting chips out of the hole for a smooth, accurate finish

9 products

Precise-Cutting Countersinks for Lathe Centers

Cut to ultratight tolerances when accuracy is critical

12 products

Drill-Point Countersinks for Lathe Centers

Create a lathe center hole without drilling a starter hole first

10 products

Carbide-Insert Countersinks for Lathe Centers

Replace dull blades to countersink hundreds of holes with the same tool

8 products

Countersinks with Two Countersinking Ends for Lathe Centers

When one end starts to wear, flip the tool around for a fresh cutting edge

16 products

Fluteless Smooth-Finish Countersinks with Two Countersinking Ends for Lathe Centers

When one end starts to wear, flip the tool around for a fresh cutting edge

2 products

Drill-Point Countersinks with Two Countersinking Ends for Lathe Centers

When one end starts to wear, flip the tool around for a fresh cutting edge

8 products

Countersink Sets for Lathe Centers

Cut recesses for a range of lathe-center diameters to align workpieces as they spin

15 products

Smooth-Finish Countersink Sets for Lathe Centers

Make smooth, uniform cuts without stopping to clear chips

1 product

Fluteless Smooth-Finish Countersink Sets for Lathe Centers

The hollow body minimizes vibration while lifting chips out of the hole for a smooth, accurate finish

1 product

Other Products

Counterbores

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

420 products

Center Drills

Drill cone-shaped openings in workpieces to mount them between centers on your lathe

359 products

Countersink Drill Bits

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

17 products

Countersunk Hole Repair Tools

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

6 products

Countersink Extensions

Lengthen the reach of threaded-shank countersinks

3 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

Counterbore Drill Bits

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

23 products