Steel Countersinks | McMaster-Carr

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Countersink Angle

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System of Measurement

Body Diameter

Number of Flutes

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Shank Diameter

Material

Shank Type

Hole Diameter

Countersink Type

Finish

Aluminum Titanium Nitride (AlTiN) Coated

Black Oxide

Titanium Aluminum Nitride (TiAlN) Coated

Titanium Carbon Nitride (TiCN) Coated

Titanium Nitride (TiN) Coated

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Overall Length

For Cutting

Number of Countersinking Ends

Shank Material

Drill Bit Size

Length

Flute Type

Body Diameters Included

REACH

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

Yes

RoHS

Compliant

Not Compliant

Export Control Classification Number (ECCN)

EAR99

DFARS Specialty Metals

Exempt

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1,957 Products

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

450 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

Drill-Point Countersinks for Screws

Drill and countersink a pilot hole without changing tools

35 products

Smooth-Finish Countersinks for Screws

Make smooth, uniform cuts without stopping to clear chips

18 products

Countersink Sets for Screws

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

10 products

Drill-Point Countersink Sets for Screws

Drill and countersink pilot holes for a range of screw sizes

1 product

Precise-Cutting Countersinks for Screws

Cut to ultratight tolerances when accuracy is critical

12 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

Countersink Hand Tools

Countersink, chamfer, and deburr in a single pass

6 products

Drill-Bit Countersinks for Wood and Plastic

Drill and countersink holes of different depths without changing tools

63 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

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

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

Countersinks with Two Countersinking Ends for Screws

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

29 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

Hex-Bit Countersink Sets for Screws

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

1 product

Two-Piece Long-Reach Countersinks for Screws

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

7 products

Smooth-Finish Countersink Sets for Screws

Make smooth, uniform cuts without stopping to clear chips

2 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

Reverse Countersinks for Screws

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

14 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

311 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

Smooth-Finish Countersinks for Rivets

Make smooth, uniform cuts without stopping to clear chips

18 products

Drill-Point Countersinks for Rivets

Drill and countersink a pilot hole without changing tools

19 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

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

Countersinks with Two Countersinking Ends for Rivets

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

14 products

Two-Piece Long-Reach Countersinks for Rivets

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

5 products

Precise-Cutting Countersinks for Rivets

Cut to ultratight tolerances when accuracy is critical

6 products

Countersink Sets for Rivets

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

5 products

Reverse Countersinks for Rivets

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

14 products

Smooth-Finish Countersink Sets for Rivets

Make smooth, uniform cuts without stopping to clear chips

2 products

For Cutting Lathe Center Holes

Countersinks for Lathe Centers

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

220 products

Smooth-Finish Countersink Sets for Lathe Centers

Make smooth, uniform cuts without stopping to clear chips

1 product

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

Smooth-Finish Countersinks for Lathe Centers

Make smooth, uniform cuts without stopping to clear chips

9 products

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

Drill-Point Countersinks for Lathe Centers

Create a lathe center hole without drilling a starter hole first

10 products

Precise-Cutting Countersinks for Lathe Centers

Cut to ultratight tolerances when accuracy is critical

6 products

Countersink Sets for Lathe Centers

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

3 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

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

Other Products

Countersink Drill Bits

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

17 products

Center Drills

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

226 products

Counterbores

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

290 products

Countersink Extensions

Lengthen the reach of threaded-shank countersinks

3 products

Countersunk Hole Repair Tools

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

5 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

Counterbore Insert Holders

Pair with inserts to create flat-bottom holes

14 products