10.2 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.

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

				10.2	0.4016"	133	66.6	Round	10.2 mm	Standard	Dormer Pramet	2958A151	000000	—	———	0


				10.2	0.4016"	168	66.5	Morse Taper	Morse 1	Standard	Dormer Pramet	3070A143	00000	—	———	0




						Titanium Nitride (TiN) Coated

						10.2	0.4016"	133	66.6	Round	10.2 mm	Standard	Dormer Pramet	8950A63	00000	—	———	0




								Black/Gold Oxide

								10.2	0.4016"	133	92.1	Round	10.2 mm	Split	Viking Norseman Drill	30565A328	00000	5	30565A448	000000


								Short Length







												Black Oxide

												10.2	0.4016"	89	43	Round	10.2 mm	Split	Dormer Pramet	28255A131	00000	—	———	0




														Titanium Nitride (TiN) Coated

														10.2	0.4016"	89	43.2	Round	10.2 mm	Split	Dormer Pramet	2979N32	00000	—	———	0


														Extended Length







																		Black Oxide

																		10.2	0.4016"	184	121	Round	10.2 mm	Standard	Dormer Pramet	88455A126	00000	—	———	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

				10.2	0.4016"	133	87.1	Round	10.2 mm	Split	Dormer Pramet	5058N75	000000




						Titanium Aluminum Nitride (TiAlN) Coated

						10.2	0.4016"	133	87	Round	10.2 mm	Split	Dormer Pramet	5058N148	00000




								Gold Oxide

								10.2	0.4016"	133	66.6	Round	10.2 mm	Split	Dormer Pramet	29355A159	00000


								Short Length







												Uncoated

												10.2	0.4016"	89	22.6	Round	10.2 mm	Split	Chicago-Latrobe	2456N135	00000

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	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 mm 10.5 mm 10.8 mm 11.0 mm 11.2 mm 11.5 mm 11.8 mm 12.0 mm 12.2 mm 12.5 mm 13.0 mm	Jobbers, Short	26"	12"	12 1/2"	Steel	Built-In Lock, Undivided bottom drawer for general storage	Two Keys	8922A44	0000000

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

				10.2	0.4016"	133	85	Parabolic	Round	10.2	Split	Viking Norseman Drill	2771N64	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.

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



		M12 × 1.75 mm	1 3/8"	5 1/16"	10.2	0.4015"	118°	Spiral	2	Metric	D6	1/4"	3464A71	000000


		Titanium Nitride (TiN)-Coated High-Speed Steel



				M12 × 1.75 mm	1 3/8"	5 1/16"	10.2	0.4015"	118°	Spiral	2	Metric	D6	1/4"	3464A133	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



		M12 × 1.75 mm	1 3/8"	4 1/16"	10.2	0.4015"	110°	Spiral	2	Metric	D6	2748A68	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
10.2	-0.005 to 0	10.2	5 1/4"	Not Rated	Rockwell C60 (Extra Hard)	Precision Ground	2900A383	000000