Drill Bit Pilots | McMaster-Carr

	Countersink Angle Countersink Angle

About Countersink Angle

82°

90°

	For Use On For Use On

	Material Material

Carbide

High-Speed Steel

Cobalt Steel

	Finish Finish

Uncoated

Titanium Aluminum Nitride
(TiAlN) Coated

Aluminum Titanium Nitride
(AlTiN) Coated

Titanium Carbonitride (TiCN)
Coated

Titanium Nitride (TiN) Coated

	System of Measurement System of Measurement

Inch

Metric

	Size Size

	Point Angle Point Angle

90°

120°

140°

	Overall Length Overall Length

	Body Diameter Body Diameter

	Trade Size Trade Size

	Individual/Set Individual/Set

Individual

Set

	For Drill Bit Size For Drill Bit Size

	Shank Diameter Shank Diameter

	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

	Decimal Size Equivalent Decimal Size Equivalent

	Shank Material Shank Material

Carbide

Steel

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

REACH Compliant

	Shank Size Shank Size

	Maximum Drilling Depth Maximum Drilling Depth

	Number of Pieces Number of Pieces

	Container Type Container Type

Metal Case

Plastic Case

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About Countersinks

Countersinks cut a cone-shaped opening to install screws and rivets flush with a surface or hold workpieces between centers on a lathe. They can also be used for chamfering and deburring.

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

Use in general purpose applications.

Carbide Drill-Point Countersinks with
Two Countersinking Ends for Screws

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

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.

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

Carbide Hole-Starting Drill Bits

Harder, stronger, and more wear resistant than cobalt steel, solid-carbide bits maintain their sharp edges longer. They require rigid toolholding to prevent breakage and should not be used in hand-held drilling applications.

Cobalt Steel Hole-Starting Drill Bits

Cobalt steel bits are heat resistant and maintain their sharp edges when drilling hard material. They are for use in both hand-held drilling and machine-tool applications.

About Countersinks

Drilling

High-Speed Steel Drill-Point Countersinkswith Two Countersinking Ends for Screws

Carbide Drill-Point Countersinks withTwo Countersinking Ends for Screws

Carbide Drill-Point Countersink Sets withTwo Countersinking Ends for Screws

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

Carbide Hole-Starting Drill Bits

Cobalt Steel Hole-Starting Drill Bits

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

Carbide Drill-Point Countersinks with
Two Countersinking Ends for Screws

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

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