10.5 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.

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







				Black Oxide

				10.5	0.4134"	133	66	Round	10.5 mm	Standard	2958A152	000000	—	———	0




						Titanium Nitride (TiN) Coated

						10.5	0.4134"	133	66	Round	10.5 mm	Standard	8950A27	00000	—	———	0




								Gold Oxide

								10.5	0.4134"	133	92.1	Round	10.5 mm	Split	30565A329	00000	5	30565A449	000000




										Uncoated

										10.5	0.4134"	133	87.3	Round	10.5 mm	Standard	2951A146	0000	—	———	0


										Short Length







														Black Oxide

														10.5	0.4134"	89	43	Round	10.5 mm	Split	28255A132	00000	—	———	0




																Titanium Nitride (TiN) Coated

																10.5	0.4134"	89	26.2	Round	10.5 mm	Split	2979N63	00000	—	———	0


																Extended Length







																				Black Oxide

																				10.5	0.4134"	184	121	Round	10.5 mm	Standard	88455A127	00000	—	———	0

Drill Bit Drawer Cabinets

Store multiple bits of each size. These cabinets have drawers marked with the sizes and decimal equivalents. They can be stacked up to three high.

			For Drill Bit		Overall
	No. of Compartments	No. of Drawers	Size, mm	Lg. Class	Lg.	Wd.	Ht.	Material	Features	Includes		Each
For Metric Drill Bits



		138	4	0.35 mm to 2.5 mm (Increments of 0.05 mm) 2.6 mm to 10.0 mm (Increments of 0.1 mm) 10.2 10.5 10.8 11.0 11.2 11.5 11.8 12.0 12.2 12.5 13.0	Jobbers, Short	26"	12"	12 1/2"	Steel	Built-In Lock, Undivided bottom drawer for general storage	Two Keys	8922A44	0000000

Drill Bit Size Gauges

For

Metric

Measure drill bit sizes with these gauges.

For System of Measurement	For Use With	For Drill Bit Size, mm	Wd.	Ht.	Thk.	Material	Color	Mounting Hole Dia.		Each
Metric	Drills	1.5, 2.0, 2.25, 2.5, 2.75, 3.0, 3.25, 3.5, 3.75, 4.0, 4.25, 4.5, 4.75, 5.0, 5.25, 5.5, 6.0, 6.5, 7.0, 7.5, 8.0, 8.5, 9.0, 9.5, 10.0, 10.5, 11.0, 11.5, 12.0, 12.5	2 1/2"	6 1/2"	5/64"	Steel	Silver	1/8"	8986A64	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
10, 10.5, 11, 11.5, 12, 12.5, 13, 13.5, 14	0.3937", 0.4134", 0.4331", 0.4528", 0.4724", 0.4921", 0.5118", 0.5315", 0.5512"	5 1/4"	1"	1 5/8"	Steel	9550T18	000000

Cobalt Steel Drill Bits


Jobbers' 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.

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.

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







				Titanium Nitride (TiN) Coated

				10.5	0.4134"	133	87	Round	10.5 mm	Split	5058N41	000000




						Gold Oxide

						10.5	0.4134"	133	66	Round	10.5 mm	Split	29355A161	00000

Carbide Drill Bits

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.

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.

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






				Uncoated

				10.5	0.4134"	114	73	Round	10.5 mm	Four Facet	3030A68	0000000


				Short Length
				Round Shank






								Titanium Nitride (TiN) Coated

								10.5	0.4134"	75	32	Round	10.5 mm	Four Facet	27515A727	000000




										Titanium Aluminum Nitride (TiAlN) Coated

										10.5	0.4134"	75	32	Round	10.5 mm	Four Facet	8879A627	00000

Carbide-Tipped Drill Bits

Jobbers' Length

Round Shank

Short 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.

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

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







				Uncoated

				10.5	0.4134"	140	81.3	Round	10.5 mm	Standard	28595A85	000000


				10.5	0.4134"	140	98	Round	10.5 mm	Split	28595A37	00000


				Short Length







								Uncoated

								10.5	0.4134"	87	31.5	Round	10.5 mm	Standard	28805A417	00000

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







				Uncoated

				10.5	0.4134"	114	73	Round	10.5	140°	Brad	Fluted	2828A132	0000000

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



		10.5	0.4134"	133	97	Round	10.5	60°	Standard	27465A427	000000

Carbide-Tipped Drill Bits for Hardened Steel

Jobbers' Length

Round Shank

Straight flutes withstand the heavy pressure needed to penetrate hardened steel. These bits cut more aggressively and resist stress better than spiral-flute bits. A lower-priced alternative to solid carbide, they stay sharp when drilling abrasive material but won’t last as long.

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		Each
Jobbers' Length







				Uncoated

				10.5	0.4134"	140	42	Round	10.5 mm	Notched	2973A74	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.

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







				Titanium Nitride (TiN) Coated

				10.5	0.4134"	133	87	Parabolic	Round	10.5	Split	7333N13	000000




						Uncoated

						10.5	0.4134"	133	66	Parabolic	Round	10.5	Split	2754A82	00000

Left-Hand Cobalt Steel Drill Bits

Jobbers' Length

Round Shank

Split

The flutes spiral in the opposite direction of other bits and stay sharp longer than high-speed steel. They’re 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.

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







				Uncoated

				10.5	0.4134"	133	98	Round	10.5 mm	Split	3474A68	000000	000000

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
10.5	-0.005 to 0	10.5	5 3/8"	Not Rated	Rockwell C60 (Extra Hard)	Precision Ground	2900A386	000000

Helical Threaded Inserts with Installation Tools

Drill Bit, Installation Tool

and Through-Hole Tap

Quickly restore stripped threads—these inserts come with through-hole taps and installation tools. The tough coils on these inserts expand once installed to anchor in a tapped hole.

Pronged—The prong attaches to an installation tool for precise control as you drive inserts in. Remove the prong with a punch or break-off tool before inserting a screw.

18-8 Stainless Steel—The choice for wet and outdoor environments, these inserts resist rust and mild chemicals.

	For Max. Hole Dia.	No. of Inserts Included	Includes		Each
Pronged







	18-8 Stainless Steel

	M10 x 1.5 mm	10	10.5	0.406"	10	Drill Bit Installation Tool Through-Hole Tap	98356A163	000000


	M10 x 1.5 mm	15	10.5	0.406"	10	Drill Bit Installation Tool Through-Hole Tap	91732A956	00000
	M10 x 1.5 mm	20	10.5	0.406"	5	Drill Bit Installation Tool Through-Hole Tap	98356A164	00000
	M10 x 1.5 mm	25	10.5	0.406"	5	Drill Bit Installation Tool Through-Hole Tap	98356A165	000000
	M10 x 1.5 mm	30	10.5	0.406"	5	Drill Bit Installation Tool Through-Hole Tap	98356A166	000000