21 ga 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.

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







				Black Oxide

				21 Ga.	0.159"	3 1/4"	1.88"	Round	0.159"	Split	2901A194	00000




						Titanium Nitride (TiN) Coated

						21 Ga.	0.159"	3 1/4"	1.88"	Round	0.159"	Split	29045A743	0000




								Titanium Aluminum Nitride (TiAlN) Coated

								21 Ga.	0.159"	3 1/4"	1.88"	Round	0.159"	Split	3178A481	0000




										Uncoated

										21 Ga.	0.159"	3 1/4"	1.88"	Round	0.159"	Standard	30585A33	0000


										Short Length







														Black Oxide

														21 Ga.	0.159"	7/8"	0.44"	Threaded	1/4"	Split	8824A68	0000


														21 Ga.	0.159"	1 1/2"	0.63"	Threaded	1/4"	Split	8824A54	0000
														21 Ga.	0.159"	2 1/8"	0.82"	Round	0.159"	Split	2896A533	0000
														21 Ga.	0.159"	2 3/8"	1.19"	Threaded	1/4"	Split	8824A39	0000




																Titanium Nitride (TiN) Coated

																21 Ga.	0.159"	2 1/8"	1.13"	Round	0.159"	Split	3584A161	0000




																		Uncoated

																		21 Ga.	0.159"	2 1/8"	1.13"	Round	0.159"	Standard	8947A173	0000


Extended Length







																		Black Oxide

																		21 Ga.	0.159"	5 3/4"	3.13"	Round	0.159"	Standard	3096A333	00000




																		Titanium Nitride (TiN) Coated

																		21 Ga.	0.159"	5 3/4"	3.38"	Round	0.159"	Standard	28965A835	00000

Cobalt Steel Drill Bits


Jobbers' Length Round Shank	Short Length Round Shank

Extended 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.

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

				21 Ga.	0.159"	3 1/4"	2.13"	Round	0.159"	Split	27995A633	00000




						Uncoated

						21 Ga.	0.159"	3 1/4"	1.88"	Round	0.159"	Split	3033A233	0000


						Short Length







										Titanium Nitride (TiN) Coated

										21 Ga.	0.159"	2 1/8"	0.63"	Round	0.159"	Split	28765A954	0000




												Uncoated

												21 Ga.	0.159"	2 1/8"	0.8"	Round	0.159"	Split	28765A71	0000


												Extended Length







																Uncoated

																21 Ga.	0.159"	5 3/4"	3.1"	Round	0.159"	Split	88555A49	00000

Chip-Clearing Tap and Drill Bit Sets for Through Holes

Also known as gun taps, the taps in these sets have spiral-point flutes that push chips ahead of the tap and out of through holes. Because they don't need to be reversed to prevent buildup, they produce threads more efficiently than standard taps and are suitable for production work. Taps have a square shank for compatibility with tap wrenches and tap holders for drill presses and milling machines. With a plug chamfer, they have 3-5 chamfered cutting threads, so they're suitable for start-to-finish tapping. All taps and drill bits are made of high-speed steel for use on most metal and plastic.

	Chamfer Type	Tap Sizes Included	Overall Lg.	Thread Type	No. of Flutes	Pitch Dia. Limit	Drill Bit Sizes Included	Drill Bit Material	Container Type		Each
Uncoated High-Speed Steel Tap



	18	Plug	6-32 8-32 10-24 10-32 1/4"-20 5/16"-18 3/8"-16 7/16"-14 1/2"-13	2" 2 1/8" 2 3/8" 2 1/2" 2 23/32" 2 15/16" 3 5/32" 3 3/8"	UNC, UNF	2, 3	H3	27/64" 5/16" 36 ga. 29 ga. 25 ga. 21 ga. 7 ga. F U	Black-Oxide High-Speed Steel	Metal Case	27275A27	0000000

Drill Bit Size Gauges

For Wire

Gauge

Measure drill bit sizes with these gauges.

For Taps—Drills/taps gauges include a tap size conversion chart.

For System of Measurement	For Use With	For Drill Bit Size	Wd.	Ht.	Thk.	Material	Color	Mounting Hole Dia.		Each
Wire Gauge	Drills/Taps	60 Ga., 59 Ga., 58 Ga., 57 Ga., 56 Ga., 55 Ga., 54 Ga., 53 Ga., 52 Ga., 51 Ga., 50 Ga., 49 Ga., 48 Ga., 47 Ga., 46 Ga., 45 Ga., 44 Ga., 43 Ga., 42 Ga., 41 Ga., 40 Ga., 39 Ga., 38 Ga., 37 Ga., 36 Ga., 35 Ga., 34 Ga., 33 Ga., 32 Ga., 31 Ga., 30 Ga., 29 Ga., 28 Ga., 27 Ga., 26 Ga., 25 Ga., 24 Ga., 23 Ga., 22 Ga., 21 Ga., 20 Ga., 19 Ga., 18 Ga., 17 Ga., 16 Ga., 15 Ga., 14 Ga., 13 Ga., 12 Ga., 11 Ga., 10 Ga., 9 Ga., 8 Ga., 7 Ga., 6 Ga., 5 Ga., 4 Ga., 3 Ga., 2 Ga., 1 Ga.	2 1/2"	6 1/2"	5/64"	Steel	Silver	1/8"	8986A68	000000

Carbide Drill Bits

Jobbers' Length

Round Shank

The hardest and most wear-resistant drill bits you can buy. Carbide bits stay sharp at high temperatures and faster speeds for the best performance on hard and difficult-to-machine materials. They last 10 to 20 times longer than their closest alternative, cobalt steel. 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.

Titanium Nitride (TiN) Coated—Drill at higher speeds and last longer than uncoated bits, especially on materials like hardened steel, iron, and stainless steel.

Titanium Aluminum Nitride (TiAlN) Coated—No drill bits last longer. These are the best for high-speed, high-temperature drilling of very hard and abrasive materials, including titanium and fiberglass.

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

				21 Ga.	0.159"	2 1/2"	1.1"	Round	0.159"	Four Facet	8825A382	000000




						Titanium Aluminum Nitride (TiAlN) Coated

						21 Ga.	0.159"	2 1/2"	1.1"	Round	0.159"	Four Facet	8879A53	00000




								Uncoated

								21 Ga.	0.159"	2 1/2"	1.1"	Round	0.159"	Four Facet	2860A33	00000

Tap and Drill Bit Cases

For Drill Bits

Steel

Store and organize drill bits so they stay in good working condition and don't go missing. These cases have individually marked holes for each size in your set.

Steel—Steel cases have stands that fold in and out. Stand them up when you need them, then fold them back into the slim case for storage inside a workbench drawer.

		For Drill Bit		Overall
	Material	No. of	Size	Lg.	Wd.	Ht.		Each
For Inch, Wire Gauge, Letter Size Drill Bits







				For Jobbers' Length

				Steel	19	1/16", 1/2", 1/4", 1/8", 21 Ga., 25 Ga., 37/64", 29 Ga., 3/16", 3/32", 3/8", 5/16", 5/32", 5/64", 7 Ga., 7/16", 7/32", F, U	7"	4"	1 1/4"	2961A43	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	For Drill Bit Size Decimal Equiv.	Lg.	Wd.	Ht.	Material		Each
3/64", 1/16", 5/64", 3/32", 7/64", 1/8", 10 Ga., 21 Ga., 25 Ga., 29 Ga., 30 Ga., 33 Ga., 36 Ga., 37 Ga., 38 Ga., 40 Ga., 43 Ga., 45 Ga., 47 Ga., 50 Ga., 53 Ga.	0.0469", 0.0595", 0.0625", 0.07", 0.0781", 0.0785", 0.082", 0.089", 0.0938", 0.098", 0.1015", 0.104", 0.1065", 0.1094", 0.113", 0.125", 0.128", 0.136", 0.1495", 0.159", 0.1935"	3 5/8"	5/8"	1/2"	Steel	9550T17	000000

Short-Flute High-Speed Steel Drill Bits

Extended Length

Round Shank

Split

The rigidity of short-length bits without sacrificing reach. The shallow drilling depth makes these less likely to wobble than other bits of the same length, so they stay centered and drill straighter. High-speed steel is good for general purpose drilling in most metals.

Extended Length—Drill through panels and thick workpieces with our longest bits.

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
Extended Length







				Black Oxide

				21 Ga.	0.159"	6"	1.88"	Round	0.159"	Split	3161A33	00000


				21 Ga.	0.159"	12"	1.88"	Round	0.159"	Split	3158A133	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

				21 Ga.	0.159"	3 1/4"	1.65"	Round	0.159"	Standard	2940A423	000000


				21 Ga.	0.159"	3 1/4"	1.9"	Round	0.159"	Split	31575A433	00000

Chip-Clearing High-Speed Steel Drill Bits


Jobbers' Length High Helix Flute Round Shank	Jobbers' Length Parabolic Flute Round Shank

Standard

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.

High Helix Flute—Less aggressive than parabolic flutes for cleaner cuts in soft 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

				21 Ga.	0.159"	3 1/4"	1.8"	Parabolic	Round	0.159"	Split	27575A43	00000




						Titanium Nitride (TiN) Coated

						21 Ga.	0.159"	3 1/4"	1.8"	Parabolic	Round	0.159"	Split	29925A966	0000




								Uncoated

								21 Ga.	0.159"	3 1/4"	1.8"	Parabolic	Round	0.159"	Split	2761A231	0000


								21 Ga.	0.159"	3 1/4"	1.88"	High Helix	Round	0.159"	Standard	2912A194	0000

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







				Uncoated

				21 Ga.	0.159"	3"	1.56"	Parabolic	Round	0.159"	Split	28555A43	00000

Short-Flute Cobalt Steel Drill Bits


Jobbers' Length Round Shank	Extended 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.

Extended Length—Drill through panels and thick workpieces with our longest bits.

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.

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







				Black Oxide

				21 Ga.	0.159"	3 1/4"	0.82"	Round	0.159"	Split	3146A195	00000


				Extended Length







								Uncoated

								21 Ga.	0.159"	6"	1.8"	Round	0.159"	Split	8952A162	0000

Carbide Drill Bits for Hardened Steel


Short Length Round Shank	Split

The hardest and most wear-resistant bits with the longest life. Straight flutes withstand the heavy pressure needed to penetrate hardened steel. These bits cut more aggressively and resist stress better than spiral-flute bits. Carbide stays sharp at high temperatures and faster speeds for the best performance on hard and difficult-to-machine materials. It 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.

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

Titanium Nitride (TiN) Coated—Drill at higher speeds and last longer than uncoated bits, especially on materials like hardened steel, iron, and stainless steel.

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

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







				Titanium Nitride (TiN) Coated

				21 Ga.	0.159"	2 1/2"	0.6"	Round	0.159"	Split	8882A592	000000




						Uncoated

						21 Ga.	0.159"	2 1/2"	0.6"	Round	0.159"	Four Facet	8944A6	00000

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.

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

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



		10-32	5/8"	3 3/8"	21 Ga.	0.159"	118°	Spiral	2	UNF	H3	1/4"	3464A15	000000


		Titanium Nitride (TiN)-Coated High-Speed Steel



				10-32	5/8"	3 3/8"	21 Ga.	0.159"	118°	Spiral	2	UNF	H3	1/4"	3464A114	00000

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



		21 Ga.	0.159"	3 1/4"	1.37"	Round	0.159"	60°	Standard	27465A333	00000

Hole-Starting Carbide Drill Bits


Short Length Round Shank	Split

Harder and more wear resistant than cobalt steel, these carbide bits create an accurate starting place in your workpiece. Cut an indent, then continue drilling with a longer bit. The indent prevents slipping so the final hole is centered and precise. Carbide stays sharp at high temperatures and faster speeds. It 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.

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

Titanium Nitride (TiN) Coated—Drill at higher speeds and last longer than uncoated bits, especially on materials like hardened steel, iron, and stainless steel.

					Shank			140° Point Angle
	Drill Bit Size	Decimal Size Equiv.	Overall Lg.	Max. Drilling Dp.	Type	Size	Drill Bit Point Type		Each
Short Length







				Titanium Nitride (TiN) Coated

				21 Ga.	0.159"	2 1/4"	0.48"	Round	0.159"	Split	88915A353	000000

Short-Flute Carbide-Tipped Drill Bits

Extended Length

Round Shank

Split

Our strongest short-flute bits, these have a carbide tip that stays sharp when drilling abrasive materials, such as titanium. The shallow drilling depth makes them less likely to wobble than other bits of the same length, so they stay centered and drill straighter.

Extended Length—Drill through panels and thick workpieces with our longest bits.

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







				Uncoated

				21 Ga.	0.159"	12"	1.6"	Round	0.159"	Split	2854A443	000000

Carbide Drill Bits for Carbon Fiber, Fiberglass, and Graphite

Jobbers' Length

Cut clean holes in abrasive material without fraying or delaminating the surface. Made of carbide, these bits resist wear to retain a sharp edge, even after after hundreds of cuts.

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







				Uncoated

				21 Ga.	0.159"	2 1/2"	1.1"	Round	0.159"	140°	Brad	Fluted	2828A878	000000

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







				Uncoated

				21 Ga.	0.159"	2 1/2"	1.1"	Round	0.159"	Split	3171A79	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.

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		1-11	12-Up
Jobbers' Length







				Uncoated

				21 Ga.	0.159"	3 1/4"	1.8"	Round	0.159"	Standard	3024A243	00000	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.

Titanium Nitride (TiN)-Coated 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							Plug Chamfer
	Size	Lg.	Overall Lg.	Size	Decimal Size Equiv.	Point Angle	Flute Type	No. of Flutes	Thread Type	Pitch Dia. Limit		Each
Uncoated High-Speed Steel



		10-32	5/8"	2 3/8"	21 Ga.	0.159"	110°	Spiral	2	UNF	H3	2748A32	000000


		Titanium Nitride (TiN)-Coated High-Speed Steel



				10-32	5/8"	2 3/8"	21 Ga.	0.159"	118°	Spiral	2	UNF	H3	2748A85	00000

Chip-Clearing Carbide Drill Bits


Jobbers' Length Parabolic Flute Round Shank	Standard

The hardest and most wear-resistant bits, the flutes clear chips and improve coolant flow. They prevent clogs and dissipate heat that can damage the bit and the hole. Carbide bits stay sharp at high temperatures and faster speeds for the best performance on hard and difficult-to-machine materials. They last 10 to 20 times longer than cobalt steel. 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.

Titanium Nitride (TiN) Coated—Drill at higher speeds and last longer than uncoated bits, especially on materials like hardened steel, iron, and stainless steel.

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

				21 Ga.	0.159"	3 5/16"	1.93"	Parabolic	Round	0.1591"	Standard	8822A56	000000




						Uncoated

						21 Ga.	0.159"	3 5/16"	1.93"	Parabolic	Round	0.1591"	Standard	8822A16	00000

Handheld Drill Bit Guides

Hold these sleeves against a workpiece to guide your drill. Originally used for aerospace manufacturing, they help you create precise, consistent holes without using a fixture plate. They’re made to tight dimensional tolerances for accurate results. Made of polycarbonate, these sleeves are strong and lightweight. They’re also clear, so you can see the surface you’re drilling.

For Removable Drill Bushings

Kit

Kits—Kits include three sleeves and nine compatible bushings in common drill bit sizes.

Component	For Bushing OD	Includes	ID	OD	Lg.	For Drill Bushing Type	Material		Each
Kit	1/2"	3 Sleeves 9 Drill Bushings (1 each for 40 Ga., 30 Ga., 5/32", 21 Ga., 3/16", 10 Ga., 7/32", 1/4", and F drill bit sizes) 3 Lock Screws	1/2"	1 3/4"	1 3/4"	SF	Polycarbonate	9460N13	0000000

For Threaded Drill Bushings

Kit

Kits—Kits include three sleeves and nine compatible bushings in common drill bit sizes.

Component	For Bushing Thread Size	Includes	ID	OD	Lg.	Material		Each
Kit	1/2"-13	3 Sleeves 9 Drill Bushings (1 each for 40 Ga., 30 Ga., 5/32", 21 Ga., 3/16", 10 Ga., 7/32", 1/4", and F drill bit sizes)	1/2"	1 3/4"	1 3/4"	Polycarbonate	9460N14	0000000

Depth-Limiting Drill Stops

Image of ProductInUse. Front orientation. Drill Stops.

Ensure identical hole depths every time. Position the collar on your bit and tighten the set screw.

	For Drill Bit Size Decimal Equiv.	Overall Lg.	OD	Hex Key Size for Set Screw	Material		Each
For Wire Gauge Drill Bits



	21 Ga.	0.1590"	1/2"	7/16"	3/32"	Steel	8865A146	00000

Extensions for Round-Shank Drill Bits

Two-Piece Extensions

Attach to the shank of a drill bit to extend its reach.

Two-Piece Extensions—To attach two-piece extensions, insert a drill bit into the collet, then thread the collet onto the extension and tighten with a wrench.

	For Drill Bit
	Size	Size Decimal Equiv.	Shank Size	Shank Size	Overall Lg.	OD	Material		Each
For Wire Gauge Drill Bits







				Two-Piece Extensions

				21 Ga.	0.1590"	0.159"	1/4"	4 1/2"	5/16"	Steel	3016A822	000000


				21 Ga.	0.1590"	0.159"	1/4"	9 1/2"	5/16"	Steel	3016A848	00000

M2 High-Speed Tool Steel Rod Sets

Supplied in a metal index case with fold-out panels, these rods, also known as drill blanks, have an undersized diameter for machining your own jobbers'-length drill bits. They are 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.

Includes	No. of Pieces	Dia. Tolerance	Mechanical Finish		Each
Sizes 1-60 and a metal index case	60	-0.0002" to 0"	Precision Ground	2952A6	0000000

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
0.159"	-0.0002" to 0"	21 Ga.	3 1/4"	Not Rated	Rockwell C60 (Extra Hard)	Precision Ground	3009A233	00000

Hole-Finding Drill Guides

Locating Pin Down Shown in

Use

Locating Pin Down

Locating Pin Up

Drill a hole in sheet metal that aligns with an existing hole in another piece. These guides line up with the original hole so you know where to drill. Also known as strap duplicators.

Locating Pin Down—The most common guides. Use these when sheet metal pieces aren’t attached or can be pried apart.

Locating Pin Up—Use these guides when two panels are held tightly together and you can’t get beneath the sheet with a drill.

Locating Pin Position	No. of Guides	For Drill Bit Size	Lg.	Wd.	Material		Each
Down	5	1/4", 10 Ga., 21 Ga., 30 Ga., 40 Ga.	6"	5/8"	Steel	9264N12	000000
Up	5	1/4", 10 Ga., 21 Ga., 30 Ga., 40 Ga.	6"	5/8"	Steel	9264N11	00000