Changeable Counterbores | McMaster-Carr

	For Use On For Use On

	Number of Pieces Number of Pieces

	Individual/Set Individual/Set

Set

	Shank Type Shank Type

	Round

	Material Material

High-Speed Steel

	Finish Finish

Uncoated

	Container Type Container Type

Wood Case

	Diameter Rating Diameter Rating

Standard

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

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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.

Change out the pilot to use the same tool to counterbore multiple diameters. Set includes 5 counterbores and 10 pilots.

Uncoated High-Speed Steel
Sizes Included	Number of Pieces	Includes	Shank Type	For Use On	Container Type		Set

1/4", 5/16", 3/8", 7/16", 1/2"	5	10 Pilots	Round	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	Wood Case	0000000	0000000

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About Counterbores

Changeable-Pilot Counterbore Sets