2 3/16" Long Drill Bits | McMaster-Carr

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.

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.

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







				Titanium Nitride (TiN) Coated

				3/16"	0.1875"	2 3/16"	0.84"	Round	3/16"	Split	Chicago-Latrobe	2416A19	00000


				17 Ga.	0.173"	2 3/16"	0.69"	Round	0.173"	Split	Dormer Pramet	28765A958	0000
				16 Ga.	0.177"	2 3/16"	0.7"	Round	0.177"	Split	Dormer Pramet	28765A959	0000
				15 Ga.	0.18"	2 3/16"	0.72"	Round	0.18"	Split	Dormer Pramet	28765A961	0000
				14 Ga.	0.182"	2 3/16"	0.72"	Round	0.182"	Split	Dormer Pramet	28765A962	0000
				13 Ga.	0.185"	2 3/16"	0.74"	Round	0.185"	Split	Dormer Pramet	28765A963	0000

Coolant-Fed Carbide Drill Bits

Maintenance Length

Round Shank

The hardest and most wear-resistant bits, these deliver coolant to reduce heat and evacuate chips. They are designed for CNC machines that supply coolant through the spindle rather than an external source, such as a hose and nozzle. Coolant flows directly from holes in the bit's tip onto the drilling surface. This speeds up cuts and leads to excellent performance in deep holes and tough materials such as stainless steel and titanium.

Maintenance Length—Shorter than jobbers' length, these bits are more rigid for less wobble when drilling hard material. Also known as mechanics’ bits.

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.

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







				Titanium Aluminum Nitride (TiAlN) Coated

				5/32"	0.1563"	2 3/16"	0.81"	Round	5/32"	Four Facet	Garr Tool	2396N988	000000

Wood Screw Threaded Stud Driver Bits

Use to install wood screw threaded studs (also known as dowel screws). Twist screws into the bit opening. These bits have a groove in the shank to fit directly into power tools.

	Overall Lg.	Material		Each
1/4" Quick-Change Hex Shank



	1/4"	2 3/16"	Steel	2496N11	000000


	5/16"	2 3/16"	Steel	2496N12	00000
	3/8"	2 3/16"	Steel	2496N13	00000

Flex Socket Adapter Sets

Convert your socket into a flex socket to access fasteners from an angle. Also known as universal joints.

No. of Pieces	Includes	Max. Access Angle	Material	Container Type		Each
3	1/4" Square Drive Flex Adapter (1 5/8" O'All Lg.) 3/8" Square Drive Flex Adapter (2 3/16" O'All Lg.) 1/2" Square Drive Flex Adapter (2 13/16" O'All Lg.)	55°	Chrome-Plated Steel	Plastic Clip Rail	8524N11	000000

Fluteless Smooth-Finish Countersinks with Pilot for Screws

Cut a smooth, accurate seat for your screw head on the first pass. The built-in pilot centers the countersink while the hollow body prevents chip buildup, vibration, and wobbling.

High-Speed Steel About High-Speed Steel

0 Flutes

These versatile, wear-resistant countersinks cut cleanly in most materials, including plastic, aluminum, and steel.

		Dia.		Pilot					Uncoated
	For Hole Dia.	Body	Shank	Dia.	Lg.	For Screw Size	Overall Lg.	Shank Type	Mfr.		Each
0 Flutes







				82° Countersink Angle

				5/16" to 41/64"	41/64"	3/8"	5/16"	5/32"	5/16"	2 3/16"	Round	Republic Drill	2739A66	000000

Fixed Torque-Limiting Socket Adapters


	Replacement Pin Kits

Already set to a specific torque limit, these adapters audibly click and release when you reach that setting to prevent overtightening.

Socket Adapters—Calibration Certificate Traceable to NIST—Adapters with a calibration certificate come with a document traceable to NIST that states the adapters passed a test for accuracy.

	Socket Adapters										Replacement Pin Kits
					Accuracy
	Torque Setting, in·lbf	Overall Lg.	OD	Torque-Limiting Direction	Clockwise	Counterclockwise	Max. Rotation Speed, rpm	Material		Each		Each
Socket Adapters







				3/8" Square Drive

				30	2 3/16"	1 1/2"	Clockwise and Counterclockwise	±5%	±5%	300	Nickel-Plated Steel	6968A101	0000000	6968A316	000000


				45	2 3/16"	1 1/2"	Clockwise and Counterclockwise	±5%	±5%	300	Nickel-Plated Steel	6968A102	000000	6968A316	00000
				50	2 3/16"	1 1/2"	Clockwise and Counterclockwise	±5%	±5%	300	Nickel-Plated Steel	6968A103	000000	6968A316	00000
				60	2 3/16"	1 1/2"	Clockwise and Counterclockwise	±5%	±5%	300	Nickel-Plated Steel	6968A53	000000	6968A316	00000
				75	2 3/16"	1 1/2"	Clockwise and Counterclockwise	±5%	±5%	300	Nickel-Plated Steel	6968A54	000000	6968A316	00000
				80	2 3/16"	1 1/2"	Clockwise and Counterclockwise	±5%	±5%	300	Nickel-Plated Steel	6968A104	000000	6968A316	00000
				100	2 3/16"	1 1/2"	Clockwise and Counterclockwise	±5%	±5%	300	Nickel-Plated Steel	6968A105	000000	6968A316	00000
				120	2 3/16"	1 1/2"	Clockwise and Counterclockwise	±5%	±5%	300	Nickel-Plated Steel	6968A321	000000	6968A316	00000
				150	2 3/16"	1 1/2"	Clockwise and Counterclockwise	±5%	±5%	300	Nickel-Plated Steel	6968A106	000000	6968A316	00000
				180	2 3/16"	1 1/2"	Clockwise and Counterclockwise	±5%	±5%	300	Nickel-Plated Steel	6968A52	000000	6968A316	00000
				200	2 3/16"	1 1/2"	Clockwise and Counterclockwise	±5%	±5%	300	Nickel-Plated Steel	6968A107	000000	6968A316	00000


				240	2 3/16"	1 1/2"	Clockwise and Counterclockwise	±5%	±5%	300	Nickel-Plated Steel	6968A55	000000	6968A316	00000
				300	2 3/16"	1 1/2"	Clockwise and Counterclockwise	±5%	±5%	300	Nickel-Plated Steel	6968A108	000000	6968A316	00000


				Socket Adapters—Calibration Certificate Traceable to NIST







								3/8" Square Drive

								30	2 3/16"	1 1/2"	Clockwise and Counterclockwise	±5%	±5%	300	Nickel-Plated Steel	8512N11	000000	6968A316	00000


								45	2 3/16"	1 1/2"	Clockwise and Counterclockwise	±5%	±5%	300	Nickel-Plated Steel	8512N12	000000	6968A316	00000
								50	2 3/16"	1 1/2"	Clockwise and Counterclockwise	±5%	±5%	300	Nickel-Plated Steel	8512N13	000000	6968A316	00000
								60	2 3/16"	1 1/2"	Clockwise and Counterclockwise	±5%	±5%	300	Nickel-Plated Steel	8512N14	000000	6968A316	00000
								75	2 3/16"	1 1/2"	Clockwise and Counterclockwise	±5%	±5%	300	Nickel-Plated Steel	8512N15	000000	6968A316	00000
								80	2 3/16"	1 1/2"	Clockwise and Counterclockwise	±5%	±5%	300	Nickel-Plated Steel	8512N16	000000	6968A316	00000
								100	2 3/16"	1 1/2"	Clockwise and Counterclockwise	±5%	±5%	300	Nickel-Plated Steel	8512N17	000000	6968A316	00000
								120	2 3/16"	1 1/2"	Clockwise and Counterclockwise	±5%	±5%	300	Nickel-Plated Steel	8512N18	000000	6968A316	00000
								150	2 3/16"	1 1/2"	Clockwise and Counterclockwise	±5%	±5%	300	Nickel-Plated Steel	8512N19	000000	6968A316	00000
								180	2 3/16"	1 1/2"	Clockwise and Counterclockwise	±5%	±5%	300	Nickel-Plated Steel	8512N21	000000	6968A316	00000
								200	2 3/16"	1 1/2"	Clockwise and Counterclockwise	±5%	±5%	300	Nickel-Plated Steel	8512N22	000000	6968A316	00000


								240	2 3/16"	1 1/2"	Clockwise and Counterclockwise	±5%	±5%	300	Nickel-Plated Steel	8512N23	000000	6968A316	00000
								300	2 3/16"	1 1/2"	Clockwise and Counterclockwise	±5%	±5%	300	Nickel-Plated Steel	8512N24	000000	6968A316	00000

Torque-Measuring Bit Adapters

Eliminate the need for multiple bulky tools with these bit adapters. At less than 3 inches long, these compact adapters convert _1/4" bit screwdriver handles and _1/4" bits into torque screwdrivers so you can fasten to a specific torque. Insert your drive handle and turn clockwise until the hash marks line up with the torque value you need. Not for use with power tools.

	Torque Range, in·lbf	Graduations, in·lbf	Clockwise Accuracy	Torque-Measuring Direction	Overall Lg.	Material		Each
Magnet Bit Holder







	Measures in·lbf

	1/4"	Hex	1/4"	6 to 25	4, 5	±10%	Clockwise	2 3/16"	Steel	92733A110	000000

Flex Socket Adapters

Convert your socket into a flex socket to access fasteners from an angle. Also known as universal joints.

The finish on these adapters resists corrosion.

Chrome-Plated Steel—Chrome-plated steel adapters have a mirror-like finish and are easy to clean.

		Each
Imported







	3/8" Square Drive

	2 3/16"	55°	Chrome-Plated Steel	8541N15	00000

Reamers for Taper-Pin Holes

Shape holes to match the profile of taper pins. After drilling a hole that matches the size of the small end of the taper pin you want to install, use these reamers to taper and finish the hole.

Round Shank

Helix Flute

These reamers fit in the chuck of drill presses, turret lathes, and other machine and power tools, making them the most common shank type.

Helix Flute—Prevent clogging when removing excess material with helix flutes. They also leave a smoother finish than straight flutes.

High-Speed Steel—Durable and wear resistant, these are good for general purpose reaming in most materials.

Left-Hand Spiral—These reamers push chips downward as they cut, so they're often used in through holes.

					Lg.
	For Taper Pin No.	Reamer Dia. (A)	Reamer Dia. (B)	Material	Flute	Overall	No. of Flutes	Spiral Direction	Cutting Dia. Tolerance	Rate of Taper	For Use On	Mfr.		Each
Helix Flute







				Inch

				5/0	0.0966"	0.0719"	High-Speed Steel	1 3/16"	2 3/16"	3	Left Hand	-0.001" to 0.001"	1:48	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	Alvord-Polk Tool	2991A13	000000

Square Shank


Straight Flute	Spiral Flute

Turn these reamers by hand with an adjustable wrench, straight-handle tap wrench, or pin vise (sold separately).

Straight Flute—The most common flute style, these reamers are suitable for a wide range of applications, but not recommended for holes with a keyway or other breaks in the surface.

Spiral Flute—Since these reamers clear chips better than straight flutes, they leave holes with a smoother finish. They're better for holes with breaks in the surface, such as a keyway, because they cut continuously across the breaks instead of moving in and out.

High-Speed Steel—Durable and wear resistant, these are good for general purpose reaming in most materials.

Left-Hand Spiral—These reamers push chips downward as they cut, so they're often used in through holes.

						Lg.
	For Taper Pin No.	Reamer Dia. (A)	Reamer Dia. (B)	Material	Square Shank Size	Flute	Overall	No. of Flutes	Spiral Direction	Cutting Dia. Tolerance	Rate of Taper	For Use On	Mfr.		Each
Straight Flute







				Inch

				5/0	0.0966"	0.0719"	High-Speed Steel	0.0800"	1 3/16"	2 3/16"	4	—	-0.001" to 0.001"	1:48	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	Alvord-Polk Tool	2990A13	000000


				Spiral Flute







								Inch

								5/0	0.0966"	0.0719"	High-Speed Steel	0.0800"	1 3/16"	2 3/16"	4	Left Hand	-0.001" to 0.001"	1:48	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	Alvord-Polk Tool	2990A43	00000

Cobalt Steel Keyseat End Mills


Keyseat Cut Style

With better heat and wear resistance than high-speed steel, these cobalt steel keyseat cutters can run at higher speeds and provide better performance on hard material. They mill precise notches in rotary shafts to fit machine keys and can also be used for slot milling.

	Mill				Neck
	Dia.	Dia. Tolerance	Thk.	Shank Dia.	Dia.	Lg.	Overall Lg.	For Use On	Cut Style	Mfr.		Each
Uncoated Cobalt Steel



		1 1/2"	0.015" to 0.020"	3/16"	1/2"	0.44"	3/8"	2 3/16"	Aluminum, Brass, Bronze, Hardened Steel, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium, Tool Steel	Keyseat	Whitney Tool	2970A834	000000

Impact Square Drive Size Adapters

Hole 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.

3/4" Square Drive—_3/4", 1", and 1 _1/2" square drive size adapters require a locking retainer on the female end. Use with an impact wrench that has a pin-style socket retainer, or use a socket retaining ring with tools that have a hole- or hole-and-ring style socket retainer.

Socket Adapters								Retaining Rings
Square Drive Size (Gender)	Overall Lg.	Compatible Retaining Ring ID	Material	Color	Socket Retainer Style		Each		Each



	3/4" (Female) × 5/8" (Male)	2 3/16"	1 7/16"	Magnesium Phosphate-Coated Steel	Black	Hole	53055A105	000000	5552A36	00000

Adjustable Torque-Limiting Socket Adapters


	Replacement Pin Kits

To set torque, remove the snap ring and locking plate and adjust the nut. When the torque setting is reached, these adapters click and release. These tools let you accurately measure or limit the torque you apply to prevent overtightening and damaging fasteners.

Clockwise Torque-Limiting Direction—Use clockwise adapters to tighten fasteners in the clockwise direction as well as loosen them in the counterclockwise direction. There’s no need to change tools.

Socket Adapters									Replacement Pin Kits
Overall Lg.	OD	Torque Range	Torque-Limiting Direction	Clockwise Accuracy	Max. Rotation Speed, rpm	Material		Each		Each







			3/8" Square Drive

			2 3/16"	1 1/2"	24 to 180 in·lbf 2 to 15 ft·lbf 2.7 to 20.3 N-m	Clockwise	±5%	300	Nickel-Plated Steel	6968A311	0000000	6968A316	000000


			2 3/16"	1 1/2"	60 to 300 in·lbf 5 to 25 ft·lbf 6.8 to 33.9 N-m	Clockwise	±5%	300	Nickel-Plated Steel	6968A312	000000	6968A316	00000

Fast-Cut High-Speed Steel Keyseat End Mills


Keyseat Cut Style

Use these end mills for general purpose keyseat cutting in a wide range of material, including aluminum, iron, and steel. An alternating right- and left-hand tooth style allows them to remove more material at high speeds than standard keyseat cutters. They mill precise notches in rotary shafts to fit machine keys and can also be used for slot milling.

	Mill				Neck
	Dia.	Dia. Tolerance	Thk.	Shank Dia.	Dia.	Lg.	Overall Lg.	For Woodruff ANSI Key No.	For Use On	Cut Style	Mfr.		Each
Uncoated High-Speed Steel



		5/8"	0.01" to 0.015"	3/16"	1/2"	0.25"	3/8"	2 3/16"	605	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	Keyseat	Keo	8765A24	000000


		3/4"	0.01" to 0.015"	3/16"	1/2"	0.28"	3/8"	2 3/16"	606	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	Keyseat	Keo	8765A27	00000
		7/8"	0.012" to 0.017"	3/16"	1/2"	0.28"	3/8"	2 3/16"	607	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	Keyseat	Keo	8765A42	00000
		1"	0.012" to 0.017"	3/16"	1/2"	0.28"	3/8"	2 3/16"	608	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	Keyseat	Keo	8765A34	00000

Carbide Keyseat End Mills


Keyseat Cut Style

Made of solid carbide, these cutters are harder, stronger, and more wear resistant than high-speed steel and cobalt steel for the longest life and best finish on hard material. Their extreme hardness means they are brittle, so a highly rigid setup, such as a CNC machine, is necessary to prevent the end mill from breaking. Use them to mill precise notches in rotary shafts to fit machine keys. They can also be used for slot milling.

	Mill				Neck
	Dia.	Dia. Tolerance	Thk.	Shank Dia.	Dia.	Lg.	Overall Lg.	For Woodruff ANSI Key No.	For Use On	Cut Style	Mfr.		Each
Uncoated Carbide



		5/8"	0.010" to 0.015"	3/16"	1/2"	0.28"	1/4"	2 3/16"	605	Aluminum, Brass, Bronze, Fiberglass, Hardened Steel, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium, Tool Steel	Keyseat	Ultra Tool	31595A19	0000000


		3/4"	0.010" to 0.015"	3/16"	1/2"	0.28"	1/4"	2 3/16"	606	Aluminum, Brass, Bronze, Fiberglass, Hardened Steel, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium, Tool Steel	Keyseat	Ultra Tool	31595A24	000000
		7/8"	0.012" to 0.017"	3/16"	1/2"	0.28"	1/4"	2 3/16"	607	Aluminum, Brass, Bronze, Fiberglass, Hardened Steel, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium, Tool Steel	Keyseat	Ultra Tool	31595A25	000000
		1"	0.012" to 0.017"	3/16"	1/2"	0.28"	1/4"	2 3/16"	608	Aluminum, Brass, Bronze, Fiberglass, Hardened Steel, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium, Tool Steel	Keyseat	Ultra Tool	31595A27	000000
		1 1/8"	0.012" to 0.017"	3/16"	1/2"	0.28"	1/4"	2 3/16"	609	Aluminum, Brass, Bronze, Fiberglass, Hardened Steel, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium, Tool Steel	Keyseat	Ultra Tool	31595A29	000000
		1 1/4"	0.012" to 0.017"	3/16"	1/2"	0.28"	1/4"	2 3/16"	610	Aluminum, Brass, Bronze, Fiberglass, Hardened Steel, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium, Tool Steel	Keyseat	Ultra Tool	31595A34	000000

High-Speed Steel Keyseat End Mills


Keyseat Cut Style

Use these end mills for general purpose keyseat cutting in a wide range of material, including aluminum, iron, and steel. They mill precise notches in rotary shafts to fit machine keys and can also be used for slot milling.

	Mill				Neck
	Dia.	Dia. Tolerance	Thk.	Shank Dia.	Dia.	Lg.	Overall Lg.	For Woodruff ANSI Key No.	For Use On	Cut Style	Mfr.		Each
Uncoated High-Speed Steel



		5/8"	0.010" to 0.015"	3/16"	1/2"	0.25"	3/8"	2 3/16"	605	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	Keyseat	Keo	3031A25	000000


		3/4"	0.010" to 0.015"	3/16"	1/2"	0.28"	3/8"	2 3/16"	606	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	Keyseat	Keo	3031A29	00000
		7/8"	0.012" to 0.017"	3/16"	1/2"	0.28"	3/8"	2 3/16"	607	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	Keyseat	Keo	3031A31	00000
		1"	0.012" to 0.017"	3/16"	1/2"	0.28"	3/8"	2 3/16"	608	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	Keyseat	Keo	3031A33	00000
		1 1/8"	0.012" to 0.017"	3/16"	1/2"	0.31"	3/8"	2 3/16"	609	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	Keyseat	Keo	3031A36	00000
		1 1/4"	0.015" to 0.020"	3/16"	1/2"	0.31"	3/8"	2 3/16"	610	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	Keyseat	Keo	3031A42	00000
		1 1/2"	0.015" to 0.020"	3/16"	1/2"	0.44"	3/8"	2 3/16"	—	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	Keyseat	Whitney Tool	2970A74	00000