2.9 mm Drill Bits | McMaster-Carr

	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

	Overall Length Overall Length

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

DFARS Specialty Metals
COTS-Exempt

DFARS Specialty Metals
Compliant

	Specifications Met Specifications Met

NAS

DIN

	Thread Size Thread Size

M3.5

	Thread Pitch Thread Pitch

0.6 mm

	Flute Type Flute Type

	Straight

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About Tool Steel

Drill Bit Decimal Size Equivalents

About Drill Bits

Black Oxide

Titanium Nitride (TiN) Coated

Black and Gold Oxide

Standard

Split

These jobbers'-length bits have the rigidity and length required for most applications.

Black-oxide and black-and-gold-oxide drill bits produce less friction than uncoated drill bits.

Titanium-nitride (TiN) coated drill bits last longer and can drill at higher speeds than uncoated and oxide-coated drill bits.

Drill bits with a split point keep centered without a pilot hole.

For technical drawings and 3-D models, click on a part number.

				Shank					Each		Pkg.
Drill Bit Size	Decimal Size Equivalent	Overall Lg.	Max. Drilling Dp.	Type	Size	Point Style	Specifications Met	For Use On		Each	Pkg. Qty.		Pkg.
Metric
Black-Oxide High-Speed Steel
2.9 mm	0.1142"	61mm	27.2mm	Round	2.9mm	Standard	DIN 338	Steel, Iron, Stainless Steel	0000000	00000	__	000000	00
Black-and-Gold Oxide High-Speed Steel
2.9 mm	0.1142"	70mm	38.1mm	Round	2.9mm	Split	NAS907 Type B	Steel, Iron, Stainless Steel	000000000	0000	10	000000000	000000
Titanium-Nitride (TiN) Coated High-Speed Steel
2.9 mm	0.1142"	61mm	27.2mm	Round	2.9mm	Standard	DIN 338	Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Aluminum, Brass, Bronze, Plastic	0000000	0000	__	000000	00

Short-Length Drill Bits

Black Oxide

Titanium Nitride (TiN) Coated

Also known as screw-machine and stub-length bits, these provide maximum rigidity for drilling straighter holes than jobbers'- and maintenance-length drill bits.

Black-oxide drill bits produce less friction than uncoated drill bits.

Titanium-nitride (TiN) coated drill bits last longer and can drill at higher speeds than uncoated and black-oxide drill bits.

For technical drawings and 3-D models, click on a part number.

				Shank					Each
Drill Bit Size	Decimal Size Equivalent	Overall Lg.	Max. Drilling Dp.	Type	Size	Point Style	Specifications Met	For Use On		Each
Metric
Black-Oxide High-Speed Steel
2.9 mm	0.1142"	46mm	7.2mm	Round	2.9mm	Standard	DIN 1897	Steel, Iron, Stainless Steel	00000000	00000
Titanium-Nitride (TiN) Coated High-Speed Steel
2.9 mm	0.1142"	46mm	7.2mm	Round	2.9mm	Standard	DIN 1897	Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Aluminum, Brass, Bronze, Plastic	0000000	0000

Cobalt Steel Drill Bits

Titanium Nitride (TiN) Coated

Titanium Aluminum Nitride (TiAlN) Coated

Gold Oxide

These jobbers'-length bits have the rigidity and length required for most applications. Made of cobalt steel, which has better heat and wear resistance than high-speed steel, they can run up to 25% faster and have a longer tool life.

Titanium-nitride (TiN) coated drill bits last longer and can drill at higher speeds than uncoated drill bits.

Titanium-aluminum-nitride (TiAlN) coated drill bits are the most wear and temperature resistant for the longest life and highest drilling speeds.

Gold-oxide drill bits produce less friction than uncoated drill bits.

Drill bits with a split point keep centered without a pilot hole.

				Shank					Each
Drill Bit Size	Decimal Size Equivalent	Overall Lg.	Max. Drilling Dp.	Type	Size	Point Style	Specifications Met	For Use On		Each
Metric
Titanium-Nitride (TiN) Coated Cobalt Steel
2.9 mm	0.1142"	61mm	33mm	Round	2.9mm	Split	DIN 338, NAS907 Type J	Steel, Hardened Steel, Iron, Stainless Steel, Nickel, Titanium, Fiberglass	0000000	00000
Titanium-Aluminum-Nitride (TiAlN) Coated Cobalt Steel
2.9 mm	0.1142"	61mm	33mm	Round	2.9mm	Split	DIN 338, NAS907 Type J	Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Titanium, Fiberglass	00000000	00000
Gold-Oxide Cobalt Steel
2.9 mm	0.1142"	61mm	27.2mm	Round	2.9mm	Split	NAS907 Type J	Steel, Hardened Steel, Iron, Stainless Steel, Nickel	00000000	0000

Chip-Clearing Cobalt Steel Drill Bits

Uncoated

The parabolic spiral flutes lift chips out of the hole, reducing clogging and improving coolant flow. With better heat and wear resistance than high-speed steel, these cobalt steel bits can run up to 25% faster and have a longer tool life. All are jobbers’ length so they have the rigidity and length required for most applications. A split point keeps the bit centered without a pilot hole.

				Shank
Drill Bit Size	Decimal Size Equivalent	Overall Lg.	Max. Drilling Dp.	Type	Size	Point Style	Specifications Met	For Use On		Each
Metric—Parabolic Spiral Flute
Uncoated Cobalt Steel
2.9 mm	0.1142"	61mm	33mm	Round	2.9mm	Split	DIN 338	Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel	00000000	00000

Quick-Change Carbide Drill Bits

Uncoated

Titanium Nitride (TiN) Coated

Make fast bit changes—all of these bits have the same shank diameter, eliminating the need for different collets to hold each size. Made of solid carbide for the highest accuracy and longest tool life, they are harder, stronger, and more wear resistant than high-speed steel, cobalt steel, and carbide-tipped bits. They retain a sharp, hard edge at high temperatures for the best performance on hard and abrasive material. These bits require rigid toolholding to prevent breakage and should not be used in handheld drilling. All are jobbers’ length so they have the rigidity and length required for most applications.

Titanium-nitride (TiN) coated drill bits last longer and can drill at higher speeds than uncoated drill bits.

Titanium-aluminum-nitride (TiAlN) coated drill bits are the most wear and temperature resistant for the longest life and highest drilling speeds.

				Shank
Drill Bit Size	Decimal Size Equivalent	Overall Lg.	Max. Drilling Dp.	Type	Size	Point Style	For Use On		Each
Metric
Uncoated Carbide
2.90 mm	0.1142"	38mm	12.1mm	Round	3.175mm	Four Facet	Steel, Iron, Stainless Steel, Aluminum, Brass, Bronze, Plastic	00000000	00000
Titanium-Nitride (TiN) Coated Carbide
2.90 mm	0.1142"	38mm	9.1mm	Round	3.175mm	Four Facet	Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Titanium, Fiberglass	00000000	00000

High-Speed Steel Left-Hand Drill Bits

Uncoated

Also known as reverse-flute bits, the flutes spiral in the opposite direction of other bits. Use in counterclockwise drilling applications such as removing broken screws. These bits are jobbers' length and have the rigidity and length required for most applications.

For technical drawings and 3-D models, click on a part number.

				Shank
Drill Bit Size	Decimal Size Equivalent	Overall Lg.	Max. Drilling Dp.	Type	Size	Point Style	For Use On	Specifications Met		Each
Metric
Uncoated High-Speed Steel
2.9 mm	0.1142"	61mm	11.6mm	Round	2.9mm	Standard	Steel, Iron, Stainless Steel	DIN 338	000000000	000000

Hex Shank Taps for Drills and Screwdrivers

Insert these taps directly into drills, power screwdrivers, and other tools that accept a 1/4" hex shank. They're made of high-speed steel and are for use on most metal and plastic. All have a plug chamfer with 3-5 chamfered cutting threads, so they're suitable for start-to-finish tapping. When using them to tap closed-end holes, be sure to leave sufficient space at the bottom for chips to accumulate.

For technical drawings and 3-D models, click on a part number.

Metric

Thread				Drill Bit				Plug Chamfer
Size	Pitch, mm	Lg.	Overall Lg.	Size	Decimal Size Equivalent	No. of Flutes	Hex Shank Size		Each
Uncoated High-Speed Steel
M3.5	0.6	3/8"	1 5/16"	2.9 mm	0.1142"	3	1/4"	0000000	000000

Hardened Undersized High-Speed M2 Tool Steel Rods

Yield Strength: Not Rated
Hardness: Rockwell C60 (Very Hard)

These rods, also known as drill blanks, have an undersized diameter for machining your own jobbers'-length drill bits. They're hardened for increased abrasion and impact resistance. M2 tool steel offers a nice balance of wear resistance and machinability. It has a high molybdenum content, which allows it to maintain sharp cutting edges even at elevated temperatures.

For technical drawings and 3-D models, click on a part number.

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

Dia.	Dia. Tolerance	Drill Bit Size	Lg.	Mechanical Finish	Straightness Tolerance		Each
2.9mm	-0.0050mm to 0.0000mm	2.9 mm	2 3/4"	Precision Ground	0.012" per ft.	00000000	00000