Piloted Countersinks | McMaster-Carr

Filter by

For Use On

Screw Size

Countersink Angle

Pilot Diameter

Body Diameter

Number of Flutes

Hole Diameter

Sold As

Shank Diameter

Pilot Length

Number of Pieces

Shank Diameters Included

Material

Overall Length

Finish

Tolerance Rating

Thread Size

Shank Material

RoHS Compliance

REACH Compliance

DFARS Compliance

Countersink Trade Size

Pilot Head Diameter

How can we improve?

188 Products

About Counterbores

Counterboring—Enlarge the top of an existing hole to create a cylindrical-shaped opening with a flat bottom that acts as a seat for the head of a screw or wood plug.

More

Countersinking

High-Speed Steel Vibration-Resistant
Through-Hole Countersinks with Pilot for Screws

The built-in pilot maintains alignment in the hole.

Vibration-Resistant Through-Hole
Countersink Sets with Pilot for Screws

Vibration-Resistant Through-Hole Countersink Sets with Pilot for Screws

The built-in pilot maintains alignment in the hole.

High-Speed Steel Drill-Point Countersink Sets
with Two Countersinking Ends for Screws

Carbide Drill-Point Countersink Sets with
Two Countersinking Ends for Screws

Carbide Drill-Point Countersink Sets with Two Countersinking Ends for Screws

For excellent performance on hard and abrasive materials, carbide is harder, stronger, and more wear resistant than high-speed steel.

Counterboring

Metric Size High-Speed Steel
Counterbores with Built-In Pilot

Inch Size High-Speed Steel
Counterbores with Built-In Pilot

Oversized High-Speed Steel
Counterbores with Built-In Pilot

Counterbore screw holes in misaligned sheets or layers of material.

Oversized Carbide-Tipped
Counterbores with Built-In Pilot for Steel

Designed for counterboring screw holes in misaligned sheets or layers of material.

Carbide-Tipped Counterbores
with Built-In Pilot for Steel

To resist damage when cutting steel, these counterbores are C5 carbide-tipped alloy steel.

Oversized Carbide-Tipped
Counterbores with Built-In Pilot for
Aluminum, Brass, Bronze, and Cast Iron

Use these counterbores with screw holes in misaligned sheets or layers of material.

Carbide-Tipped Counterbores with Built-In Pilot
for Aluminum, Brass, Bronze, and Cast Iron

C2 carbide-tipped alloy steel has excellent performance on abrasive materials such as cast iron and nonferrous metals.

Counterbores for High-Profile
Rounded-Head Screws

Mil. Spec. Counterbores for Hydraulic Ports

Create contoured profiles for installing hydraulic ports in accordance with military and SAE specifications.

Inch Size Counterbore Sets with Built-In Pilot

Inch Size Counterbore Sets with Built-In Pilot

Metric Size Counterbore Sets with Built-In Pilot

Metric Size Counterbore Sets with Built-In Pilot

Oversized Counterbore Sets with Built-In Pilot

Oversized Counterbore Sets with Built-In Pilot

Use these counterbore sets when the screw holes in sheets or layers of material are misaligned.

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