3.3 mm Drill Bits | McMaster-Carr

Extended Length—Drill through panels and thick workpieces with our longest bits. Their length is good for creating deep holes but makes them less rigid than other bits. As a result, they are more prone to wobbling or breaking, especially when drilling hard materials.

Black Oxide—The dark finish increases wear resistance and reduces friction to improve chip flow, so these bits can last 50% longer than uncoated bits.

Titanium Nitride (TiN) Coated—Drill at higher speeds and last longer than uncoated and oxide-coated bits, especially on tough materials like hardened steel and nickel.

Uncoated—The most economical option, uncoated bits perform best when used on low-carbon steel and aluminum. Polished to reduce friction, they're also known as bright finish bits.

Black/Gold Oxide—Like black oxide, this finish adds wear resistance and reduces friction for improved chip flow. Because it’s less prone to flaking off, it offers better rust protection when bits aren't in use.

					Shank				Each		Package
	Drill Bit Size, mm	Decimal Size Equiv.	Overall Lg., mm	Max. Drilling Dp., mm	Type	Size	Drill Bit Point Type	Mfr.		Each	Pkg. Qty.		Pkg.
Jobbers' Length







				Black Oxide

				3.3	0.1299"	65	29.4	Round	3.3 mm	Standard	Dormer Pramet	2958A64	00000	10	2958A642	000000




						Titanium Nitride (TiN) Coated

						3.3	0.1299"	65	31	Round	3.3 mm	Standard	Chicago-Latrobe	8950A13	0000	—	———	0




								Black/Gold Oxide

								3.3	0.1299"	73	41.3	Round	3.3 mm	Split	Viking Norseman Drill	30565A253	0000	10	30565A426	00000


								Short Length







												Black Oxide

												3.3	0.1299"	49	11.4	Round	3.3 mm	Split	Dormer Pramet	28255A26	0000	—	———	0




														Titanium Nitride (TiN) Coated

														3.3	0.1299"	49	18	Round	3.3 mm	Split	Dormer Pramet	2979N17	0000	—	———	0


														Extended Length







																		Black Oxide

																		3.3	0.1299"	160	93.4	Round	3.3 mm	Standard	Dormer Pramet	88455A38	00000	—	———	0




																				Uncoated

																				3.3	0.1299"	106	62.4	Round	3.3 mm	Standard	Dormer Pramet	3083A136	0000	—	———	0

Cobalt Steel Drill Bits


Jobbers' Length Round Shank	Short Length Round Shank	Split

Tough and wear resistant, cobalt steel bits last at least twice as long as high-speed steel. They can also run up to 25% faster at higher temperatures without being damaged on hard materials, such as nickel.

Jobbers' Length—These bits have the balance of rigidity and length needed for most applications.

Short Length—The most rigid bits for drilling the straightest holes.

Titanium Nitride (TiN) Coated—Drill at higher speeds and last longer than uncoated and oxide-coated bits, especially on tough materials like hardened steel and nickel.

Titanium Aluminum Nitride (TiAlN) Coated—The hardest and most wear-resistant coating, especially at high temperatures. These bits are best for hard and abrasive materials, such as iron, titanium, and fiberglass.

Gold Oxide—Like black oxide, this finish adds wear resistance and reduces friction for improved chip flow. Because it’s less prone to flaking off, it offers better rust protection when bits aren't in use.

Uncoated—Polished to eject chips, these are also known as bright finish bits.

					Shank
	Drill Bit Size, mm	Decimal Size Equiv.	Overall Lg., mm	Max. Drilling Dp., mm	Type	Size	Drill Bit Point Type	Mfr.		Each
Jobbers' Length







				Titanium Nitride (TiN) Coated

				3.3	0.1299"	64	36.1	Round	3.3 mm	Split	Dormer Pramet	5058N58	00000




						Titanium Aluminum Nitride (TiAlN) Coated

						3.3	0.1299"	65	31.1	Round	3.3 mm	Split	Guhring	2753A165	00000




								Gold Oxide

								3.3	0.1299"	65	29.4	Round	3.3 mm	Split	Dormer Pramet	29355A55	0000


								Short Length







												Titanium Nitride (TiN) Coated

												3.3	0.1299"	49	11.4	Round	3.3 mm	Split	Chicago-Latrobe	2456N146	0000




														Uncoated

														3.3	0.1299"	49	11.4	Round	3.3 mm	Split	Chicago-Latrobe	2456N118	0000

Smooth-Finish Carbide Drill Bits


Jobbers' Length Round Shank	Split

With more cutting edges than other drill bits, these cut continuously and consistently for a smoother finish. They also stay centered to produce holes that are straighter and more accurate. However, since there’s less space between the cutting edges, they don’t clear chips as quickly. Made of carbide, these are the hardest and most wear-resistant drill bits you can buy. They stay sharp at high temperatures and faster speeds for the best performance on hard and difficult-to-machine materials. Carbide can be brittle, however, so these bits require a rigid machine tool holder to prevent breakage and should not be used in hand drilling applications.

Jobbers' Length—These bits have the balance of rigidity and length needed for most applications.

Uncoated—Excellent for a range of materials but won't last as long as coated bits.

					Shank
	Drill Bit Size, mm	Decimal Size Equiv.	Overall Lg., mm	Max. Drilling Dp., mm	Type	Size	Drill Bit Point Type	Mfr.		Each
Jobbers' Length







				Uncoated

				3.3	0.1299"	49	18	Round	3.3 mm	Split	Kyocera	2783A13	000000

Drill Bit Guides

Place these guides on your workpiece to drill precise holes without building a fixture. They'll even work on corners and round surfaces. Lines marked on the side allow you to align your holes accurately. Made of hardened steel, they’re tough enough to withstand frequent use.

For Drill Bit Size, mm	For Drill Bit Size Decimal Equiv.	Lg.	Wd.	Ht.	Material		Each
3, 3.3, 3.5, 4, 4.2, 4.5, 5, 5.5, 6, 6.5, 6.8, 7, 7.5, 8, 8.5, 9, 9.5	0.1181", 0.1299", 0.1378", 0.1575", 0.1654", 0.1772", 0.1968", 0.2165", 0.2362", 0.2559", 0.2677", 0.2756", 0.2953", 0.315", 0.3346", 0.3543", 0.374"	5 1/2"	3/4"	7/8"	Steel	9550T15	000000

Left-Hand High-Speed Steel Drill Bits

Jobbers' Length

Round Shank

Standard

With flutes that spiral in the opposite direction of other bits, these are primarily used to remove stripped screws. Choose a bit that’s slightly smaller than the diameter of the screw’s head. Set your power tool to rotate in reverse. Slowly drill in the center of the screw head, maintaining constant pressure. As the bit penetrates, it will catch onto the screw and reverse it out of the hole. If the screw is badly stripped, you might need to punch a starter hole. Also known as reverse-flute bits. High-speed steel is the versatile choice for drilling most metals.

Jobbers' Length—These bits have the balance of rigidity and length needed for most applications.

Black Oxide—The dark finish increases wear resistance and reduces friction to improve chip flow, so these bits can last 50% longer than uncoated bits.

					Shank					Each
	Drill Bit Size, mm	Decimal Size Equiv.	Overall Lg., mm	Max. Drilling Dp., mm	Type	Size	Drill Bit Point Type	Mfr.		1-9	10-Up
Jobbers' Length







				Black Oxide

				3.3	0.13"	65	28.7	Round	3.3 mm	Standard	Dormer Pramet	29855A53	000000	00000

Carbide-Tipped Drill Bits

Jobbers' Length

Round Shank


Split	Standard

Performance similar to solid carbide but at a lower price point. Like carbide bits, these are stronger than cobalt and high-speed steel and maintain their sharp edges when drilling abrasive material. However, when drilling tough metals like iron and hardened steel, upgrade to carbide for longer life.

Jobbers' Length—These bits have the balance of rigidity and length needed for most applications.

					Shank
	Drill Bit Size, mm	Decimal Size Equiv.	Overall Lg., mm	Max. Drilling Dp., mm	Type	Size	Drill Bit Point Type	Mfr.		Each
Jobbers' Length







				Uncoated

				3.3	0.1299"	79	41.9	Round	3.3 mm	Standard	Izar	28595A44	000000


				3.3	0.1299"	79	44	Round	3.3 mm	Split	ICS	28595A19	00000

Chip-Clearing Cobalt Steel Drill Bits


Jobbers' Length Parabolic Flute Round Shank	Split

Avoid clogs and dissipate heat with cobalt bits that last at least twice as long as high-speed steel. The flutes clear chips to improve coolant flow and prevent damage to the bit and the hole. They also speed up drilling since you don't have to stop to clear the bit manually.

Jobbers' Length—These bits have the balance of rigidity and length needed for most applications.

Uncoated—Polished to eject chips, these are also known as bright finish bits.

						Shank
	Drill Bit Size, mm	Decimal Size Equiv.	Overall Lg., mm	Max. Drilling Dp., mm	Flute Type	Type	Size, mm	Drill Bit Point Type	Mfr.		Each
Jobbers' Length







				Uncoated

				3.3	0.1299"	64	34	Parabolic	Round	3.3	Split	Viking Norseman Drill	2771N47	00000

Chip-Clearing Cobalt Steel Drill Bits for Nickel and Stainless Steel

Jobbers' Length

Parabolic Flute

Round Shank

Split

Excellent for challenging metals such as stainless steel and nickel alloys, these bits cut aggressively and evacuate chips quickly. The grooved flutes prevent clogs and improve coolant flow to dissipate heat that can damage the bit or your material. Bits are made of tough and wear-resistant cobalt steel.

Jobbers' Length—These bits have the balance of rigidity and length needed for most applications.

						Shank
	Drill Bit Size, mm	Decimal Size Equiv.	Overall Lg., mm	Max. Drilling Dp., mm	Flute Type	Type	Size, mm	Drill Bit Point Type	Mfr.		Each
Jobbers' Length







				Titanium Aluminum Nitride (TiAlN) Coated

				3.3	0.1299"	65	36	Parabolic	Round	3.3	Split	Guhring	3020A39	000000

Hex-Bit Taps

You only need one tool to turn these taps and install screws. The _1/4" hex shank fits hand or powered screwdrivers for threading holes. Then switch to a screwdriver bit to finish the job. To tap in hard-to-reach spots, add a bit extension. Taps have straight flutes that are good for most jobs.

High-Speed Steel—The most versatile taps resist heat and wear to stay sharp. They’re good for most metals and plastic.

Uncoated—The economical choice, these won't last as long as coated taps.

Plug Chamfer—Our go-to chamfer type, these thread both through holes and blind holes. The tapered section is shorter than a taper chamfer and longer than bottoming chamfer. As a result, they're easier to turn than bottoming taps but require more force than taper taps.

						Drill Bit				Plug Chamfer
	Thread Size	Thread Lg.	Overall Lg.	Thread Type	No. of Flutes	Size, mm	Decimal Size Equiv.	Shank Type	Hex Shank Size		Each
High-Speed Steel







				Uncoated

				M4 × 0.7 mm	1/2"	1 3/8"	Metric	3	3.3	0.1299"	Hex	1/4"	1021N23	000000

Quick-Change Hex Shank Drill Taps for Drills and Screwdrivers

Save time when you need to change drill taps frequently. The grooved shank snaps directly into drills, power screwdrivers, and other tools that accept a 1/4" hex shank. However, they’re not rated for impact drivers. With a drill bit point to drive into the workpiece, these taps can drill and tap holes in a single step. They’re made of high-speed steel and are for use on most metal and plastic.

Their spiral flutes keep chips clear by drawing them back toward the tap and out of the hole. All have a plug chamfer with 3-5 chamfered cutting threads, so they’re suitable for start-to-finish tapping.

Uncoated High-Speed Steel—Uncoated taps are strong enough for most tapping jobs but have the shortest tool life.

	Thread			Drill Bit								Plug Chamfer
	Size	Lg.	Overall Lg.	Size, mm	Decimal Size Equiv.	Point Angle	Flute Type	No. of Flutes	Thread Type	Pitch Dia. Limit	Hex Shank Size		Each
Uncoated High-Speed Steel



		M4 × 0.7 mm	1/2"	3 1/8"	3.3	0.1299"	118°	Spiral	2	Metric	D4	1/4"	3464A51	000000


		Titanium Nitride (TiN)-Coated High-Speed Steel



				M4 × 0.7 mm	1/2"	3 1/8"	3.3	0.1299"	118°	Spiral	2	Metric	D4	1/4"	3464A126	00000

Drill Taps

Spiral Flute

Drill holes and cut threads without switching tools. Made of high-speed steel, these taps are for use on most metal and plastic. The square shank is compatible with tap holders for drill presses and milling machines. All have a plug chamfer with 3-5 chamfered cutting threads, so they're suitable for start-to-finish tapping.

Uncoated High-Speed Steel—Uncoated taps are strong enough for most tapping jobs but have the shortest tool life.

Spiral Flute—Taps with spiral flutes keep chips clear by drawing them back toward the tap and out of the hole.

	Thread			Drill Bit							Plug Chamfer
	Size	Lg.	Overall Lg.	Size, mm	Decimal Size Equiv.	Point Angle	Flute Type	No. of Flutes	Thread Type	Pitch Dia. Limit		Each
Uncoated High-Speed Steel



		M4 × 0.7 mm	1/2"	2 1/8"	3.3	0.1299"	110°	Spiral	2	Metric	D4	2748A61	000000


		Titanium Nitride (TiN)-Coated High-Speed Steel



				M4 × 0.7 mm	1/2"	2 1/8"	3.3	0.1299"	118°	Spiral	2	Metric	D4	2748A93	00000

Undersized Hardened Multipurpose M2 High-Speed Tool Steel Rods

These rods, also known as drill blanks, have an undersized diameter for machining your own 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.

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

Dia., mm	Dia. Tolerance, mm	Drill Bit Size, mm	Lg.	Yield Strength	Hardness	Mechanical Finish		Each
3.3	-0.005 to 0	3.3	2 7/8"	Not Rated	Rockwell C60 (Extra Hard)	Precision Ground	2900A263	00000

Impact Wrench Drill Taps

Drill and thread holes in a single fluid step that’s 15 times faster than by hand. Made with an oversized shank and hardened high-speed steel, these drill taps are built to handle the high torque of your impact wrench to cut material quickly. A built-in pilot starts the hole while the taper chamfer gradually engages material for clean, accurate threads. Your wrench’s rapid hammering helps break and clear chips as you cut, so you don’t need to pause and reverse. This also means these drill taps are less likely to jam on chips and snap. They’re a great choice for quickly preparing threaded through holes in thin materials.

You’ll need a VersaDrive chuck (sold separately) to install these drill taps into your impact wrench. You can also get chucks for impact drivers (sold separately).

Titanium Nitride (TiN)-Coated Hardened High-Speed Steel—Titanium Nitride (TiN) coated taps resist heat and wear better than uncoated taps, letting them last up to twice as long.

Spiral Flute—Taps with spiral flutes keep chips clear by drawing them back toward the tap and out of the hole.

	Thread			Drill Bit										Taper Chamfer
	Size	Lg.	Overall Lg.	Size, mm	Decimal Size Equiv.	Point Angle	Max. Tapping Dp.	Flute Type	No. of Flutes	Thread Type	Pitch Dia. Limit	Shank Type	Hex Shank Size		Each
Titanium Nitride (TiN)-Coated Hardened High-Speed Steel



		M4 × 0.7 mm	13/32"	2 11/16"	3.3	0.13"	135°	5/32"	Spiral	2	Metric	D5	VersaDrive Hex	7/16"	9672N19	000000

Accessories for Taps

Required Chucks

Quick-Change

Strong-Hold

These chucks mount directly onto the square drive of your impact wrench. They work with any tool with a VersaDrive hex shank, so you don’t need to swap chucks to use reamers, taps, and other tools.

Quick-Change Pull-Back Tool Release—Require just one hand to load. Push your tool in the chuck until you hear the ball detents click into place. To remove your tool, pull back the collar.

Strong-Hold Push-Forward Tool Release—Hold cutting tools more securely than quick-change chucks. To insert and remove cutting tools, you must push a collar forward. Since impact force drives your cutting tool the opposite way, it can’t come loose from the chuck while you work.

Manganese Phosphate-Coated Steel—The coating on these chucks prevents rust.

		For Shank
	For Square Drive Size	Type	Size	Overall Lg.	Material	Includes		Each
Quick-Change Pull-Back Tool Release



		1/2"	VersaDrive Hex	7/16"	2 5/32"	Black-Oxide Steel	Retaining Ring, Retention Pin	9589N112	000000


		Strong-Hold Push-Forward Tool Release



				3/8"	VersaDrive Hex	7/16"	2"	Manganese Phosphate-Coated Steel	Retaining Ring, Retention Pin	9589N111	000000


				1/2"	VersaDrive Hex	7/16"	2 5/32"	Manganese Phosphate-Coated Steel	Retaining Ring, Retention Pin	9589N113	000000
				3/4"	VersaDrive Hex	7/16"	2 3/8"	Manganese Phosphate-Coated Steel	Retaining Ring, Retention Pin	9589N114	000000

Optional Extensions

Extend your cutting tool’s reach. These extensions attach to your chuck and accept any tool with a VersaDrive hex shank.

		For Shank		Shank
	Overall Lg.	Type	Size	Type	Size	OD	Material		Each
Quick-Change Pull-Back Tool Release



		5"	VersaDrive Hex	7/16"	VersaDrive Hex	7/16"	1 7/64"	Black-Oxide Steel	9589N115	000000


		12"	VersaDrive Hex	7/16"	VersaDrive Hex	7/16"	1 7/64"	Black-Oxide Steel	9589N116	00000