5 7/8" Long Drill Bits | McMaster-Carr

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.

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 and titanium.

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.

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







				Black Oxide

				31/64"	0.4844"	5 7/8"	3.64"	Round	31/64"	Split	2901A141	000000	6	2901A532	000000




						Titanium Nitride (TiN) Coated

						31/64"	0.4844"	5 7/8"	3.64"	Round	31/64"	Split	29115A741	00000	6	29115A841	000000




								Titanium Aluminum Nitride (TiAlN) Coated

								31/64"	0.4844"	5 7/8"	3.64"	Round	31/64"	Split	3202A74	00000	—	———	0




										Uncoated

										31/64"	0.4844"	5 7/8"	3.64"	Round	31/64"	Standard	8870A44	00000	6	8870A144	00000

Cobalt Steel Drill Bits

Jobbers' Length

Round Shank

Jobbers' Length

Hex 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.

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

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







				Titanium Nitride (TiN) Coated

				31/64"	0.4844"	5 7/8"	4.38"	Round	31/64"	Split	27995A541	000000




						Uncoated

						31/64"	0.4844"	5 7/8"	3.14"	Hex	31/64"	Split	4909N32	00000


						31/64"	0.4844"	5 7/8"	3.6"	Round	31/64"	Split	3069A42	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.	Dia. Tolerance	Drill Bit Size	Lg.	Yield Strength	Hardness	Mechanical Finish		Each
0.4844"	-0.0002" to 0"	31/64"	5 7/8"	Not Rated	Rockwell C60 (Extra Hard)	Precision Ground	3009A144	000000
12 mm	-0.005 mm to 0 mm	12 mm	5 7/8"	Not Rated	Rockwell C60 (Extra Hard)	Precision Ground	2900A413	00000
12.1 mm	-0.005 mm to 0 mm	12.1 mm	5 7/8"	Not Rated	Rockwell C60 (Extra Hard)	Precision Ground	2900A414	00000
12.2 mm	-0.005 mm to 0 mm	12.2 mm	5 7/8"	Not Rated	Rockwell C60 (Extra Hard)	Precision Ground	2900A415	00000
12.3 mm	-0.005 mm to 0 mm	12.3 mm	5 7/8"	Not Rated	Rockwell C60 (Extra Hard)	Precision Ground	2900A416	00000
12.4 mm	-0.005 mm to 0 mm	12.4 mm	5 7/8"	Not Rated	Rockwell C60 (Extra Hard)	Precision Ground	2900A417	00000

Carbide-Tipped Drill Bits

Jobbers' Length

Round Shank


Standard	Split

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







				Uncoated

				31/64"	0.4844"	5 7/8"	3.75"	Round	31/64"	Standard	2940A38	000000


				31/64"	0.4844"	5 7/8"	3.75"	Round	31/64"	Split	31575A29	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.

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

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







				Titanium Nitride (TiN) Coated

				31/64"	0.4844"	5 7/8"	3.8"	Parabolic	Round	31/64"	Split	3183A71	000000


				1/2"	0.5"	5 7/8"	3.8"	Parabolic	Round	1/2"	Split	3183A72	00000




						Uncoated

						31/64"	0.4844"	5 7/8"	3.8"	Parabolic	Round	31/64"	Split	29925A941	00000


						1/2"	0.5"	5 7/8"	3.8"	Parabolic	Round	1/2"	Split	29925A942	00000

Reduced-Shank High-Speed Steel Drill Bits

Jobbers' Length

Split

Cut large holes with drill presses and portable drills that have a standard-size chuck. The shank on these bits has a smaller diameter than the cutting tip. High-speed steel is good for general purpose drilling in most metals. Also known as Silver and Deming bits.

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







				Black Oxide

				31/64"	0.4844"	5 7/8"	4.38"	Reduced Round	3/8"	Split	8773A57	000000

High-Speed Steel Drill Bits for Plastic

The precision-ground, 60° point penetrates gradually to prevent cracking and chipping. It also reduces heat that can deform the material. Use these bits for drilling into acrylic, laminate, and other plastics. They're made of wear-resistant high-speed steel.

Jobbers' Length About Jobbers' Length

					Shank
	Drill Bit Size	Decimal Size Equiv.	Overall Lg.	Max. Drilling Dp.	Type	Size	Point Angle	Drill Bit Point Type		Each
Uncoated



		31/64"	0.4844"	5 7/8"	4.38"	Round	31/64"	60°	Standard	27465A68	000000

Chip-Clearing High-Speed Steel Drill Bits for Aluminum, Brass, and Bronze

Jobbers' Length

Low Helix Flute

Round Shank

Standard

Designed for soft metals that can gum up other drill bits, wide flutes lift chips out of the hole. This prevents clogs that can weaken and damage the bit and ruin the hole. Also known as slow spiral bits, these are made of versatile high-speed steel.

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

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.

						Shank				Each
	Drill Bit Size	Decimal Size Equiv.	Overall Lg.	Max. Drilling Dp.	Flute Type	Type	Size	Drill Bit Point Type		1-5	6-Up
Jobbers' Length







				Uncoated

				31/64"	0.4844"	5 7/8"	3.4"	Low Helix	Round	31/64"	Standard	2928A241	000000	000000

Short-Flute Cobalt Steel Drill Bits


Jobbers' Length Round Shank	Split

These bits combine the toughness and wear resistance of cobalt with short flutes for rigidity. The shallow drilling depth makes them less likely to wobble than other bits of the same length, so they stay centered and drill straighter. Cobalt lasts at least twice as long as high-speed steel. It can also run up to 25% faster at higher temperatures without damaging the bit on hard materials such as nickel.

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	Decimal Size Equiv.	Overall Lg.	Max. Drilling Dp.	Type	Size	Drill Bit Point Type		1-4	5-Up
Jobbers' Length







				Black Oxide

				31/64"	0.4844"	5 7/8"	1.46"	Round	31/64"	Split	3146A142	000000	000000

Bit Adapters

Magnet Bit

Holder

Use hex-shank bits (also known as insert bits) in drills and powered screwdrivers. These adapters have a groove in the shank to fit in a power-tool chuck.

	For Bit Shank Type	For Bit Hex Shank Size	Overall Lg.	Material		Each
Magnet Bit Holder



	1/4"	Hex	1/4"	5 7/8"	Stainless Steel	7225A32	000000

Chip-Clearing High-Speed Steel Drill Bits


Jobbers' Length Parabolic Flute Round Shank	Split

With flutes that lift chips out of the hole, you don't have to stop drilling to clear these bits manually. They improve coolant flow to dissipate heat and prevent clogs that can damage the bit and ruin the hole. High-speed steel is good for general purpose drilling in most metals.

Parabolic Flute—A U-shaped groove on the flutes cuts faster and clears chips more quickly than high-helix bits, so these are better for drilling deeper holes.

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.

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.

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







				Black Oxide

				31/64"	0.4844"	5 7/8"	3.4"	Parabolic	Round	31/64"	Split	29925A41	000000




						Titanium Nitride (TiN) Coated

						31/64"	0.4844"	5 7/8"	3.4"	Parabolic	Round	31/64"	Split	29925A81	00000




								Uncoated

								31/64"	0.4844"	5 7/8"	3.4"	Parabolic	Round	31/64"	Split	2754A71	00000

Impact Square Drive Size Adapters

Pin Socket Retainer

Convert from one square drive size to another. The female side of the adapter attaches to your wrench; the male side to your socket. These adapters are made to withstand the high torque and force of impact tools.

Overall Lg.	Material	Color	Socket Retainer Style		Each



1/2" (Female) × 3/8" (Male)	5 7/8"	Magnesium Phosphate-Coated Steel	Black	Pin	53055A108	000000

Left-Hand High-Speed Steel Drill Bits


Jobbers' Length Round Shank	Split

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.

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.

					Shank				Each
	Drill Bit Size	Decimal Size Equiv.	Overall Lg.	Max. Drilling Dp.	Type	Size	Drill Bit Point Type		1-5	6-Up
Jobbers' Length







				Uncoated

				31/64"	0.4844"	5 7/8"	3.4"	Round	31/64"	Split	2876A431	000000	000000

Oversized Hardened Multipurpose M2 High-Speed Tool Steel Rods

Also known as reamer blanks, these rods have an oversized diameter that allows for finishing to your exact requirements. 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.	Dia. Tolerance	Reamer Size	Lg.	Fabrication	Yield Strength	Hardness	Mechanical Finish		Each
0.4844"	0" to 0.0002"	31/64"	5 7/8"	Hot Rolled	Not Rated	Rockwell C60 (Extra Hard)	Precision Ground	3023A244	000000

Tight-Tolerance Ultra-Heat-Resistant M42 High-Speed Tool Steel Rods

Machine saw blades, end mills, and other cutting tools that stay hard and sharp at top speeds and temperatures. M42 runs faster and hotter than other grades of high-speed tool steel, so it slices through material as tough as titanium without softening or wearing down. Precision ground and held to a strict tightness tolerance, this steel is all set to turn in your lathe. Also known as cobalt steel.

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

Dia.	Dia. Tolerance	Lg.	Yield Strength	Hardness	Mechanical Finish		Each
31/64"	-0.0002" to 0"	5 7/8"	Not Rated	Rockwell C65 (Extra Hard)	Precision Ground	8813A87	000000

High-Speed Steel Square End Mills

2 Flutes

Use these end mills for general purpose milling in most material, such as aluminum, brass, bronze, iron, and steel. They have a square end for milling square slots, pockets, and edges.

End mills with fewer flutes provide better chip clearance for high-volume, high-speed plunge, slotting, and roughing cuts; end mills with more flutes provide a finer finish and operate with less vibration when run at high speeds.

Uncoated High-Speed Steel—Use uncoated end mills for general purpose milling and short production runs.

Titanium Nitride (TiN)-Coated High-Speed Steel—Use titanium nitride (TiN)-coated end mills for demanding, high-speed jobs in hard material as well as for longer production runs. They’re more wear resistant than uncoated end mills, which means they last longer when run at similar speeds.

Center Cutting—Center-cutting end mills allow plunge cuts into a surface.

	Mill
	Dia.	Dia. Tolerance	Shank Dia.	Lg. of Cut	Overall Lg.	Flute Spacing	Helix Angle	For Use On	End Mill Type	Cut Style		Each
Uncoated High-Speed Steel







				2 Flutes

				7/8"	0.000" to 0.001"	7/8"	3 5/8"	5 7/8"	Equal	30°	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	Center Cutting	Square	3051A582	000000


				Titanium Nitride (TiN)-Coated High-Speed Steel







								2 Flutes

								7/8"	0.000" to 0.001"	7/8"	3 5/8"	5 7/8"	Equal	30°	Aluminum, Brass, Bronze, Hardened Steel, Iron, Nickel, Stainless Steel, Steel, Tool Steel	Center Cutting	Square	8949A849	00000

High-Speed Steel Square End Mills with Two Milling Ends

2 Flutes

When one end wears out, switch to the opposite end for two times the life of a standard high-speed steel end mill. Made of high-speed steel, these end mills are for general purpose milling in most material, such as aluminum, brass, bronze, iron, and steel. Their square ends make them good for milling square slots, pockets, and edges. All are center cutting, allowing plunge cuts into a surface.

Uncoated High-Speed Steel—Use uncoated end mills for general purpose milling and short production runs.

	Mill
	Dia.	Dia. Tolerance	Shank Dia.	Lg. of Cut	Overall Lg.	Flute Spacing	Helix Angle	For Use On	End Mill Type	Cut Style		Each
Uncoated High-Speed Steel







				2 Flutes

				1"	-0.0015" to 0.0000"	1"	1 5/8"	5 7/8"	Equal	30°	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	Center Cutting	Square	3049A38	000000


				Titanium Nitride (TiN)-Coated High-Speed Steel







								2 Flutes

								1"	-0.0015" to 0.0000"	1"	1 5/8"	5 7/8"	Equal	30°	Aluminum, Brass, Bronze, Hardened Steel, Iron, Nickel, Stainless Steel, Steel, Tool Steel	Center Cutting	Square	8924A99	00000