4-40 Taps | McMaster-Carr

Cobalt Steel—These taps resist higher temperatures and and last twice as long as high-speed steel taps. They thread hard materials such as iron and hardened steel without damaging their cutting edges.

Carbide—The hardest and most wear-resistant taps. They last 10 times longer than high-speed steel for the best performance on hard and abrasive materials like nickel and fiberglass. Carbide can be brittle, however, so these taps require a rigid machine tool holder to prevent breakage and should not be used for hand tapping.

Carbon Steel—The economical choice for occasional hand tapping. These work on most metals and plastic but will dull more quickly than other taps.

Uncoated—The economical choice, these won't last as long as coated taps.

Titanium Nitride (TiN) Coated—Run at higher speeds and last twice as long as uncoated taps.

Titanium Carbon Nitride (TiCN) Coated—Resist heat, chipping, and wear for three times the life of uncoated taps.

Titanium Aluminum Nitride (TiAlN) Coated—No taps last longer. These are the best for high-speed, high-temperature drilling of tough materials such as iron.

Taper Chamfer—Good for both starting holes and threading through holes. These taps have the longest taper to gradually engage with the material, reducing the force needed to turn them. They can't reach the bottom of blind holes, however, so you will likely need to finish with a bottoming-chamfer tap.

Plug Chamfer—Our go-to chamfer type, these thread both through holes and blind holes. The tapered section is shorter than a taper chamfer and longer than bottoming chamfer. As a result, they're easier to turn than bottoming taps but require more force than taper taps.

Bottoming Chamfer—Cut all the way to the bottom of blind holes with taps that have the shortest taper. Since these require the most force to turn, they’re often used to finish holes started by taper- or plug-chamfer taps.

Number of Flutes—Taps with fewer flutes have more space to capture chips, so you won’t have to clear them as often. However, they can be more difficult to keep straight in the hole.

Taps Sold as Sets—Include one tap of each chamfer type.

	Taps														Taps Sold as Sets
						Drill Bit			Taper Chamfer		Plug Chamfer		Bottoming Chamfer
	Thread Size	Thread Lg.	Overall Lg.	Thread Type	No. of Flutes	Size	Decimal Size Equiv.	Shank Type		Each		Each		Each	No. of Taps		Each
High-Speed Steel







				Uncoated

				4-40	9/16"	1 7/8"	UNC	2	43 Ga.	0.089"	Square	———	0	26955A24	00000	26955A64	00000	—	———	0


				4-40	9/16"	1 7/8"	UNC	3	43 Ga.	0.089"	Square	2522A665	00000	2522A715	0000	2522A735	0000	3	2522A865	000000




						Titanium Nitride (TiN) Coated

						4-40	9/16"	1 7/8"	UNC	2	43 Ga.	0.089"	Square	———	0	26955A13	00000	26955A71	00000	—	———	0


						4-40	9/16"	1 7/8"	UNC	3	43 Ga.	0.089"	Square	2636A21	00000	2636A41	00000	2636A61	00000	3	2636A81	00000




								Titanium Carbon Nitride (TiCN) Coated

								4-40	9/16"	1 7/8"	UNC	3	43 Ga.	0.089"	Square	26545A113	00000	26545A18	00000	26545A143	00000	3	26545A173	00000


								Cobalt Steel







												Uncoated

												4-40	5/16"	1 7/8"	UNC	3	43 Ga.	0.089"	Square	———	0	2662A41	00000	———	0	—	———	0




														Titanium Nitride (TiN) Coated

														4-40	5/16"	1 7/8"	UNC	3	43 Ga.	0.089"	Square	———	0	25215A51	00000	———	0	—	———	0


														Carbide







																		Titanium Aluminum Nitride (TiAlN) Coated

																		4-40	5/16"	1 7/8"	UNC	2	43 Ga.	0.089"	Square	———	0	7822N24	000000	7822N25	000000	—	———	0


Carbon Steel







																		Uncoated

																		4-40	9/16"	1 7/8"	UNC	3	43 Ga.	0.089"	Square	25995A125	0000	25995A145	0000	25995A165	0000	—	———	0

Tap, Die, and Drill Bit Sets

Cut and repair threads and drill holes in many different sizes. Tap and die wrenches are included. The dies are hex shaped for use with conventional wrenches. The taps are made of carbon steel and are recommended for thread repair and occasional tapping.

Taper Chamfer—Taper chamfer taps have 7-10 chamfered threads at the tip for cutting into the workpiece. They require less torque than other chamfer types, making them a good choice for starting threads and tapping through holes. However, a longer taper means that they cannot thread as close to the bottom of closed-end holes.

Plug Chamfer—Plug chamfer taps are a versatile choice for most tapping applications. With 3-5 chamfered cutting threads, they require moderate torque and are often used for start-to-finish tapping of through holes and closed-end holes. However, they do not start threads as easily as taper chamfers. When using them to tap closed-end holes, be sure to leave sufficient space at the bottom for chips to accumulate.

	Drill Bit Sizes Included	Container Type	Includes	Tap Chamfer Type		Each
Carbon Steel







	Right-Hand Thread

	117	4-40, 6-32, 8-32, 10-24, 10-32, 12-24, 1/8"-27, 1/8"-28, 1/4"-20, 1/4"-28, 5/16"-18, 5/16"-24, 3/8"-16, 3/8"-24, 7/16"-14, 7/16"-20, 1/2"-13, 1/2"-20, M3 × 0.50 mm, M4 × 0.70 mm, M4 × 0.75 mm, M5 × 0.80 mm, M5 × 0.90 mm, M6 × 1.00 mm, M7 × 1.00 mm, M8 × 1.00 mm, M8 × 1.25 mm, M9 × 1.00 mm, M9 × 1.25 mm, M10 × 1.25 mm, M10 × 1.50 mm, M11 × 1.50 mm, M12 × 1.50 mm, M12 × 1.75 mm	4-40, 6-32, 8-32, 10-24, 10-32, 12-24, 1/8"-27, 1/8"-28, 1/4"-20, 1/4"-28, 5/16"-18, 5/16"-24, 3/8"-16, 3/8"-24, 7/16"-14, 7/16"-20, 1/2"-13, 1/2"-20, M3 × 0.50 mm, M4 × 0.70 mm, M4 × 0.75 mm, M5 × 0.80 mm, M5 × 0.90 mm, M6 × 1.00 mm, M7 × 1.00 mm, M8 × 1.00 mm, M8 × 1.25 mm, M9 × 1.00 mm, M9 × 1.25 mm, M10 × 1.25 mm, M10 × 1.50 mm, M11 × 1.50 mm, M12 × 1.50 mm, M12 × 1.75 mm	5/64", 7/64", 5/32", 1/4", 19/64", 5/16", 21/64", 3/8", 25/64", 13/32", 27/64", 29/64", 43 ga., 39 ga., 36 ga., 30 ga., 29 ga., 25 ga., 21 ga., 20 ga., 16 ga., 9 ga., 7 ga., 3 ga., B, F, H, I, J, O, Q, R, S, U, Z	Plastic Case	Die Wrench (2), Extractor (5), Tap Wrench (3), Thread Gauge (2)	Taper, Plug	82955A11	0000000

Chip-Clearing Tap Sets

A range of sizes that remove chips so they don’t ruin the threads or jam the tap. The spiral-point flutes force chips through the hole to prevent buildup and create threads faster than standard taps. Also known as gun taps.

High-Speed Steel

Image of Product. Front orientation. Taps. Chip-Clearing Tap Sets.

The most versatile taps resist heat and wear to stay sharp. They’re good for most metals and plastic.

Gold Oxide—The finish increases wear resistance and reduces friction to improve chip flow, so these taps can last 50% longer than uncoated taps.

							Plug Chamfer
	No. of Pieces	Thread Size	Thread Type	Flute Type	Container Type	Shank Type		Each
Gold Oxide



		19	0-80, 1-64, 1-72, 2-56, 2-64, 3-48, 3-56, 4-40, 4-48, 5-40, 5-44, 6-32, 6-40, 8-32, 8-36, 10-24, 10-32, 12-24, 12-28	UNF, UNC	Spiral Point	Metal Case	Square	27275A22	0000000

Tap Sets

These sets include a variety of taps for threading holes so screws, bolts, and rods fit snugly.

High-Speed Steel—Single Thread Size Sets

Taper, Plug, and Bottoming

Chamfer Set

The most versatile taps resist heat and wear to stay sharp. They’re good for most metals and plastic. These sets include one of each chamfer type: Taper for starting holes and threading through holes; plug for through holes and blind holes; and bottoming for cutting the closest to the bottom of any hole.

Uncoated—The economical choice, these won't last as long as coated taps.

Titanium Nitride (TiN) Coated—Run at higher speeds and last twice as long as uncoated taps.

Titanium Carbon Nitride (TiCN) Coated—Resist heat, chipping, and wear for three times the life of uncoated taps.

							Taper Chamfer, Plug Chamfer, Bottoming Chamfer
	No. of Pieces	Thread Size	Thread Type	Container Type	No. of Flutes	Shank Type		Each
Uncoated



		3	4-40	UNC	Plastic Case	3	Square	2522A865	000000


		Titanium Nitride (TiN) Coated



				3	4-40	UNC	Plastic Case	3	Square	2636A81	00000


				Titanium Carbon Nitride (TiCN) Coated



						3	4-40	UNC	Plastic Case	3	Square	26545A173	00000

High-Speed Steel—Multiple Thread Size Sets

Plug Chamfer Set

The most versatile taps resist heat and wear to stay sharp. They’re good for most metals and plastic. These sets include multiple sizes of plug chamfer taps for through holes and blind holes.

Uncoated—The economical choice, these won't last as long as coated taps.

						Plug Chamfer
	No. of Pieces	Thread Size	Thread Type	Container Type	Shank Type		Each
Uncoated



		10	1 each of sizes 4-40, 6-32, 8-32, 10-24, 10-32, 1/4"-20, 5/16"-18, 3/8"-16, 1/2"-13, and 5/8"-11	UNF, UNC	Metal Case	Square	25555A31	0000000


		19	1 each of sizes 0-80, 1-64, 1-72, 2-56, 2-64, 3-48, 3-56, 4-40, 4-48; 5-40, 5-44, 6-32, 6-40, 8-32, 8-36, 10-24, 10-32, 12-24, and 12-28	UNF, UNC	Metal Case	Square	27045A21	000000

Carbon Steel—Single Thread Size Sets

Taper, Plug, and Bottoming

Chamfer Set

The economical choice for occasional hand tapping. These work on most metals and plastic but will dull more quickly than other taps. Sets include one each chamfer type: Taper for starting holes and through holes; plug for through holes and blind holes; and bottoming for cutting the closest to the bottom of any hole.

							Taper Chamfer, Plug Chamfer, Bottoming Chamfer
	No. of Pieces	Thread Size	Thread Type	Container Type	No. of Flutes	Shank Type		Each
Uncoated



		3	4-40	UNC	Plastic Case	3	Square	25995A335	00000

Chip-Clearing Taps


Spiral-Point Flute for Through Holes	Spiral Flute for Blind Holes

Remove long, stringy chips to produce cleaner threads than standard taps. The flute design prevents buildup to protect the quality of the threads and avoid damage to the tap. Since you don’t need to reverse these taps to extract chips, they also create threads faster.

High-Speed Steel—The most versatile taps resist heat and wear to stay sharp. They’re good for most metals and plastic.

Uncoated—The economical choice, these won't last as long as coated taps.

Titanium Nitride (TiN) Coated—Run at higher speeds and last twice as long as uncoated taps.

Titanium Carbon Nitride (TiCN) Coated—Resist heat, chipping, and wear for three times the life of uncoated taps.

Spiral-Point Flute for Through Holes—Push chips ahead of the tap and out of through holes. Also known as gun taps.

Spiral Flute for Blind Holes—Pull chips back toward the tap so they won't build up in blind holes. When tapping brittle material like iron that creates fine or powdery debris, choose a straight-flute tap.

Plug Chamfer—Our go-to chamfer type. With a longer taper than a bottoming chamfer, they are easier to turn but won't thread as close the bottom of a hole.

Bottoming Chamfer—These taps have the shortest taper to thread close to the bottom of blind holes. They require the most force to turn, so they’re often used to finish holes started by plug-chamfer taps.

					Drill Bit			Spiral-Point Flute for Through Holes				Spiral Flute for Blind Holes
	Thread Size	Thread Lg.	Overall Lg.	Thread Type	Size	Decimal Size Equiv.	Shank Type	Chamfer Type	No. of Flutes		Each	Chamfer Type	No. of Flutes		Each
High-Speed Steel







				Uncoated

				4-40	9/16"	1 7/8"	UNC	43 Ga.	0.089"	Square	Plug	2	2523A444	00000	Plug	2	2529A12	000000


				4-40	9/16"	1 7/8"	UNC	43 Ga.	0.089"	Square	—	—	———	0	Bottoming	2	2529A44	00000




						Titanium Nitride (TiN) Coated

						4-40	9/16"	1 7/8"	UNC	43 Ga.	0.089"	Square	Plug	2	2762A36	00000	Plug	2	26255A31	00000


						4-40	9/16"	1 7/8"	UNC	43 Ga.	0.089"	Square	—	—	———	0	Bottoming	2	26255A51	00000




								Titanium Carbon Nitride (TiCN) Coated

								4-40	5/16"	1 7/8"	UNC	43 Ga.	0.089"	Square	—	—	———	0	Plug	2	2523A911	00000


								4-40	5/16"	1 7/8"	UNC	43 Ga.	0.089"	Square	—	—	———	0	Bottoming	2	2523A912	00000
								4-40	9/16"	1 7/8"	UNC	43 Ga.	0.089"	Square	Plug	2	2568A33	00000	—	—	———	0

Tap and Die Sets

Use a single set for many sizes of internal and external threads. The taps and dies are for use on most metal and plastic.

Carbon Steel—Carbon steel taps are for thread repair and occasional tapping.

High-Speed Steel—High-speed steel taps and dies last longer than carbon steel when used on similar material.

Plug Chamfer—Plug-chamfer taps are a versatile choice for most tapping applications. With 3-5 chamfered cutting threads, they require moderate torque and are often used for start-to-finish tapping of through holes and closed-end holes. However, they do not start threads as easily as taper-chamfer taps. When using them to tap closed-end holes, be sure to leave sufficient space at the bottom for chips to accumulate.

Taper Chamfer—Taper-chamfer taps have 7-10 chamfered threads at the tip for cutting into the workpiece. They require less torque than other chamfer types, making them a good choice for starting threads and tapping through holes. However, a longer taper means that they cannot thread as close to the bottom of closed-end holes.

Hex—Hex-shaped dies are for thread repair and can be used with conventional wrenches.

	Die Shape	Die Sizes Included	Wd.	Container Type	Includes		Each
Carbon Steel Taps and Dies







	Right-Hand Thread

	40	4-40, 6-32, 8-32, 10-24, 10-32, 12-24, 1/8"-27, 1/4"-20, 1/4"-28, 5/16"-18, 5/16"-24, 3/8"-16, 3/8"-24, 7/16"-14, 7/16"-20, 1/2"-13, 1/2"-20	Plug, Taper	Hex	4-40, 6-32, 8-32, 10-24, 10-32, 12-24, 1/8"-27, 1/4"-20, 1/4"-28, 5/16"-18, 5/16"-24, 3/8"-16, 3/8"-24, 7/16"-14, 7/16"-20, 1/2"-13, 1/2"-20	5/8", 1"	Plastic Case	Die Wrench (2), Tap Wrench (3), Thread Gauge	2625A12	0000000


	65	4-40, 6-32, 8-32, 10-24, 10-32, 12-24, 1/8"-27, 1/4"-20, 1/4"-28, 5/16"-18, 5/16"-24, 3/8"-16, 3/8"-24, 7/16"-14, 7/16"-20, 1/2"-13, 1/2"-20, 9/16"-12, 9/16"-18, 5/8"-11, 5/8"-18, 3/4"-10, 3/4"-16, 7/8"-9, 7/8"-14, 1"-8, 1"-14, 1/4"-18	Plug, Taper	Hex	4-40, 6-32, 8-32, 10-24, 10-32, 12-24, 1/8"-27, 1/4"-18, 1/4"-20, 1/4"-28, 5/16"-18, 5/16"-24, 3/8"-16, 3/8"-24, 7/16"-14, 7/16"-20, 1/2"-13, 1/2"-20, 9/16"-12, 9/16"-18, 5/8"-11, 5/8"-18, 3/4"-10, 3/4"-16, 7/8"-14, 7/8"-9, 1"-8, 1"-14	5/8", 1", 1 7/16", 1 13/16"	Plastic Case	Die Wrench (4), Tap Wrench (4), Thread Gauge	26075A71	000000


	High-Speed Steel Taps and Dies







					Right-Hand Thread

					40	4-40, 6-32, 8-32, 10-24, 10-32, 12-24, 1/8"-27, 1/4"-20, 1/4"-28, 5/16"-18, 5/16"-24, 3/8"-16, 3/8"-24, 7/16"-14, 7/16"-20, 1/2"-13, 1/2"-20	Plug	Hex	4-40, 6-32, 8-32, 10-24, 10-32, 12-24, 1/8"-27, 1/4"-20, 1/4"-28, 5/16"-18, 5/16"-24, 3/8"-16, 3/8"-24, 7/16"-14, 7/16"-20, 1/2"-13, 1/2"-20	1"	Plastic Case	Die Wrench, Screwdriver, Tap Wrench (3), Thread Gauge	26055A64	000000

Tap and Drill Bit Sets

Plastic Case

Drill and tap a variety of hole sizes. These taps and drill bits are for use on metal and plastic.

Uncoated Carbon Steel Tap—Uncoated carbon steel taps are for thread repair and occasional tapping.

Plug Chamfer—Plug-chamfer taps are a versatile choice for most tapping applications. With 3-5 chamfered cutting threads, they require moderate torque and are often used for start-to-finish tapping of through holes and closed-end holes. However, they do not start threads as easily as taper chamfers. When using them to tap closed-end holes, be sure to leave sufficient space at the bottom for chips to accumulate.

Black-Oxide High-Speed Steel Drill Bit—Black-oxide high-speed steel drill bits have a longer tool life than carbon steel. They cut with less friction than uncoated drill bits.

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



	13	Plug	1 each of sizes: 4-40 6-32 8-32 10-24 10-32 1/4"-20	2" 2 1/8" 2 9/32" 2 9/16" 2 39/64"	UNC, UNF	3, 4	H3	43 ga. 35 ga. 29 ga. 25 ga. 21 ga. 7 ga.	Black-Oxide High-Speed Steel	Plastic Case	Tap Wrench	2609A12	000000

Chip-Free Taps

No flutes, no chips. Press threads into material for zero buildup to slow you down or damage the tap. Since these displace rather than cut material, they create stronger, cleaner threads. They require an exact hole size, however, or tapping can be difficult and result in weak threads. Fluteless taps are faster and require more force to drive than fluted taps, so they're commonly used in production work on a milling machine. Also known as cold-forming taps.

High-Speed Steel—The most versatile taps resist heat and wear to stay sharp. They’re good for most metals.

Uncoated—The economical choice, these won't last as long as coated taps.

Titanium Nitride (TiN) Coated—Run at higher speeds and last twice as long as uncoated taps.

						Drill Bit			Plug Chamfer		Bottoming Chamfer
	Thread Size	Thread Lg.	Overall Lg.	Thread Type	No. of Flutes	Size	Decimal Size Equiv.	Shank Type		Each		Each
High-Speed Steel







				Uncoated

				4-40	5/16"	1 7/8"	UNC	0	38 Ga.	0.1015"	Square	2531A14	000000	2531A26	000000




						Titanium Nitride (TiN) Coated

						4-40	5/16"	1 7/8"	UNC	0	38 Ga.	0.1015"	Square	———	0	2534A33	00000


						4-40	5/8"	1 7/8"	UNC	0	38 Ga.	0.1015"	Square	2534A31	00000	———	0

Chip-Clearing Taps for Steel and Stainless Steel


Spiral-Point Flute for Through Holes	Spiral Flute for Blind Holes

Made of a high-vanadium alloy, these taps are harder and more wear-resistant than other high-speed steel taps. The flute design prevents buildup to protect the quality of the threads and avoid damage to the tap. Since you don’t need to reverse these taps to extract chips, they also create threads faster.

High-Speed Steel—The most versatile taps resist heat and wear to stay sharp. They’re good for most metals and plastic.

Black Oxide—The dark finish increases wear resistance and reduces friction to improve chip flow, so these taps can last 50% longer than uncoated taps.

Spiral-Point Flute for Through Holes—Push chips ahead of the tap and out of through holes. Also known as gun taps.

Plug Chamfer—Our go-to chamfer type. With a longer taper than a bottoming chamfer, they are easier to turn but won't thread as close the bottom of a hole.

						Drill Bit			Spiral-Point Flute for Through Holes			Spiral Flute for Blind Holes
	Thread Size	Thread Lg.	Overall Lg.	Thread Type	No. of Flutes	Size	Decimal Size Equiv.	Shank Type	Chamfer Type		Each	Chamfer Type		Each
High-Speed Steel







				Black Oxide

				4-40	1/2"	1 7/8"	UNC	2	43 Ga.	0.089"	Square	Plug	2684A29	000000	Bottoming	27055A31	000000

Chip-Clearing Taps for Aluminum, Brass, and Bronze

Spiral Flute for Through Holes

Spiral Flute for Blind Holes

Long, gummy strands from soft metals won’t get stuck on the tap or in the hole. With two layers of slippery coating over spiral flutes, these taps prevent chip buildup that can harm the threads and the tap.

Cobalt Steel—Tough and wear resistant, cobalt taps last twice as long as high-speed steel. They also can run at higher temperatures without damage to their cutting edges.

Titanium Nitride (TiN) Coated—Run at higher speeds and last twice as long as uncoated taps.

Spiral Flute for Through Holes—Left-hand flutes push chips ahead of the tap and out of through holes.

Spiral Flute for Blind Holes—Pull chips back toward the tap so they won't build up in blind holes.

Plug Chamfer—Our go-to chamfer type. With a longer taper than a bottoming chamfer, they are easier to turn but won't thread as close the bottom of a hole.

					Drill Bit			Spiral Flute for Through Holes				Spiral Flute for Blind Holes
	Thread Size	Thread Lg.	Overall Lg.	Thread Type	Size	Decimal Size Equiv.	Shank Type	Chamfer Type	No. of Flutes		Each	Chamfer Type	No. of Flutes		Each
Cobalt Steel







				Titanium Nitride (TiN) Coated/Chromium Carbide (CrC) Coated

				4-40	5/16"	2 13/64"	UNC	43 Ga.	0.089"	Square	Plug	2	2687A42	000000	Bottoming	3	2687A75	000000

Drill Out Tap Extractor Sets for Screw Thread Taps

After using a large-diameter bit to drill a starter hole in a broken tap, drill out the tap with one of these tools. Sets include multiple extractors for use with different tap sizes and two picks for removing the remains.

No. of Pieces	Includes	For Tap Size	Overall Lg.	OD	Material	Container Type		Each
7	Four Tap Extractors, Pin Vise, Two Picks	No. 4, No. 5, No. 6, No. 8, No. 10, No. 12, 1/4", 5/16", 3/8", 7/16", 1/2", M3, M3.5, M4, M5, M6, M7, M8, M10, M12	1 1/4" 1 1/2" 2" 2 1/2"	1/8" 5/64" 3/16" 1/4"	Carbide	Plastic Case	2624A25	0000000

Long-Reach Chip-Clearing Taps

Push out chips while threading holes that are hard to reach or obstructed. These taps are double the length of standard taps to reach inside machines or through assemblies such as pulleys and belts. The flute design prevents buildup to protect the quality of the threads and avoid damage to the tap. Since you don’t need to reverse these taps to extract chips, they also create threads faster.

Black Oxide—The dark finish increases wear resistance and reduces friction to improve chip flow, so these taps can last 50% longer than uncoated taps.

Spiral-Point Flute for Through Holes—Push chips ahead of the tap and out of through holes. Also known as gun taps.

Plug Chamfer—Our go-to chamfer type. With a longer taper than a bottoming chamfer, they are easier to turn but won't thread as close the bottom of a hole.

					Drill Bit		Shank		Spiral-Point Flute for Through Holes
	Thread Size	Thread Lg.	Overall Lg.	Thread Type	Size	Decimal Size Equiv.	Type	Dia.	Chamfer Type	No. of Flutes		Each
Cobalt Steel







				Black Oxide

				4-40	5/16"	6"	UNC	43 Ga.	0.089"	Square	0.141"	Plug	2	2589A19	000000

Oversized Chip-Clearing Taps

Spiral-Point Flute for Through Holes

Remove chips as you cut slightly oversized threads that create space for plating or compensate for shrink from heat treating. These taps have a pitch diameter that’s 0.0055" larger than standard taps. The spiral-point flutes force chips through the hole so there’s no buildup to damage the threads or the tap.

High-Speed Steel—The most versatile taps resist heat and wear to stay sharp. They’re good for most metals and plastic.

Uncoated—The economical choice, these won't last as long as coated taps.

Spiral-Point Flute for Through Holes—Push chips ahead of the tap and out of through holes. Also known as gun taps.

Plug Chamfer—Our go-to chamfer type. With a longer taper than a bottoming chamfer, they are easier to turn but won't thread as close the bottom of a hole.

					Drill Bit			Spiral-Point Flute for Through Holes
	Thread Size	Thread Lg.	Overall Lg.	Thread Type	Size	Decimal Size Equiv.	Shank Type	Chamfer Type	No. of Flutes		Each
High-Speed Steel







				Uncoated

				4-40	9/16"	1 7/8"	UNC	43 Ga.	0.089"	Square	Plug	2	2612A11	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.

	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



		4-40	3/8"	2 7/8"	43 Ga.	0.089"	118°	Spiral	2	UNC	H2	1/4"	3464A11	000000

Chip-Clearing Taps for Titanium

Spiral Flute for Through Holes

Spiral Flute for Blind Holes

Sharp, angled flutes cut through tough titanium alloys while reducing heat and preventing clogs. These taps draw out chips gradually to create clean threads and protect the tap from jamming or breaking.

Cobalt Steel—Tough and wear resistant, cobalt taps last twice as long as high-speed steel. They also can run at higher temperatures without damage to their cutting edges.

Black Oxide—The dark finish increases wear resistance and reduces friction to improve chip flow, so these taps can last 50% longer than uncoated taps.

Spiral Flute for Through Holes—Left-hand flutes push chips ahead of the tap and out of through holes.

Spiral Flute for Blind Holes—Pull chips back toward the tap so they won't build up in blind holes.

Plug Chamfer—Our go-to chamfer type. With a longer taper than a bottoming chamfer, they are easier to turn but won't thread as close the bottom of a hole.

							Drill Bit			Spiral Flute for Through Holes		Spiral Flute for Blind Holes
	Thread Size	Thread Lg.	Overall Lg.	Thread Type	Chamfer Type	No. of Flutes	Size	Decimal Size Equiv.	Shank Type		Each		Each
Cobalt Steel







				Black Oxide

				4-40	13/32"	2 3/16"	UNC	Plug	2	43 Ga.	0.089"	Square	2439A12	000000	2401A28	000000

Helical Insert Taps

Match the size of helical inserts so they fit tightly when installed in the hole.

High-Speed Steel—These taps resist heat and wear to stay sharp.

Plug Chamfer—Our go-to chamfer type. With a longer taper than a bottoming chamfer, they are easier to turn but won't thread as close the bottom of a hole.

						Drill Bit			Plug Chamfer		Bottoming Chamfer
	For Insert Size	Thread Lg.	Overall Lg.	For Insert Thread Type	No. of Flutes	Size	Decimal Size Equiv.	Shank Type		Each		Each
High-Speed Steel







				Uncoated

				4-40	11/16"	2"	UNC	3	31 Ga.	0.12"	Square	91709A101	000000	91709A407	000000

Tap Extractor Sets for Screw Thread Taps

To extract taps of different sizes, these sets include multiple extractors. Fingers on the extractor grip the flutes on a broken tap. Use with a tap wrench to remove taps with straight flutes from the workpiece.

No. of Pieces	For Three-Flute Tap Size	For Four-Flute Tap Size	Material	Container Type	For Number of Tap Flutes		Each
13	No. 4, No. 5, No. 6, 1/8", M3, M3.5	No. 8, No. 10, No. 12, No. 14, 3/16", 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", 7/16", 15/32", 1/2", 9/16", 5/8", 11/16", 3/4", M4, M4.5, M5, M5.5, M6, M6.3, M7, M8, M9, M10, M11, M12, M12.5, M14, M16, M18, M19, M20	Steel	Plastic Case	3, 4	2561A425	0000000
15	No. 4, No. 5, No. 6, 1/8", M3, M3.5	No. 8, No. 10, No. 12, No. 14, 3/16", 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", 7/16", 15/32", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8", 15/16", 1", M2, M4, M4.5, M5, M5.5, M6, M6.3, M7, M8, M9, M10, M11, M12, M12.5, M14, M16, M18, M19, M20, M22, M24, M25	Steel	Plastic Case	3, 4	2561A426	000000

Chip-Clearing Taps for Nickel

Spiral Flute for Through Holes

Spiral Flute for Blind Holes

Avoid heat buildup that can deform material and prematurely wear taps when threading nickel alloys. The body on these taps narrows closer to the flutes for better coolant flow and less contact with the workpiece. Spiral flutes prevent stuck chips that can slow you down and decrease the quality of the threads.

Cobalt Steel—Tough and wear resistant, cobalt taps last twice as long as high-speed steel. They also can run at higher temperatures without damage to their cutting edges.

Black Oxide—The dark finish increases wear resistance and reduces friction to improve chip flow, so these taps can last 50% longer than uncoated taps.

Spiral Flute for Through Holes—Left-hand flutes push chips ahead of the tap and out of through holes.

Spiral Flute for Blind Holes—Pull chips back toward the tap so they won't build up in blind holes.

Plug Chamfer—Our go-to chamfer type. With a longer taper than a bottoming chamfer, they are easier to turn but won't thread as close the bottom of a hole.

					Drill Bit			Spiral Flute for Through Holes				Spiral Flute for Blind Holes
	Thread Size	Thread Lg.	Overall Lg.	Thread Type	Size	Decimal Size Equiv.	Shank Type	Chamfer Type	No. of Flutes		Each	Chamfer Type	No. of Flutes		Each
Cobalt Steel







				Black Oxide

				4-40	9/16"	1 7/8"	UNC	43 Ga.	0.089"	Square	—	—	———	0	Plug	3	2626A12	000000


				4-40	9/16"	1.88"	UNC	43 Ga.	0.089"	Square	Plug	2	25595A12	000000	—	—	———	0

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



		4-40	3/8"	1 7/8"	43 Ga.	0.089"	110°	Spiral	2	UNC	H2	2748A14	000000


		Titanium Nitride (TiN)-Coated High-Speed Steel



				4-40	3/8"	1 7/8"	43 Ga.	0.089"	118°	Spiral	2	UNC	H2	2748A81	00000

Tap Extractors for Screw Thread Taps

Fingers on the extractor grip the flutes on a broken tap. Use with a tap wrench to remove taps with straight flutes from the workpiece without damaging the surrounding threads.

Tap Extractors						Replacement Tap Extractor Fingers
For Tap Size	Material	Square Shank Size	Choose a Number of Tap Flutes		Each	Choose a Number of Tap Flutes	Pkg. Qty.		Pkg.
No. 4, M3	Steel	0.07"	2, 3	2561A521	000000	2, 3	12	2561A546	000000

Drill Out Tap Extractors for Screw Thread Taps

After using a large-diameter bit to drill a starter hole in a broken tap, drill out the tap with one of these tools. Remove the remains with a scriber or pick.

For Tap Size	OD	Overall Lg.	Material		Each
No. 4, No. 5, No. 6, M3, M3.5	5/64"	1 1/4"	Carbide	2624A11	000000

Helical Threaded Insert Assortments with Installation Tools

Repair damaged threads or create new ones. These convenient assortments include helical inserts, an installation tool for each thread size, a drill bit, and a tap. The inserts are also known as Heli-Coil inserts.

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.

	Drill Bit Size	For Max. Hole Dia.		Each
Pronged







	18-8 Stainless Steel

	36	4-40 Thread × 0.112" Installed Lg. (12 Each) 4-40 Thread × 0.168" Installed Lg. (12 Each) 4-40 Thread × 0.224" Installed Lg. (12 Each) Drill Bit Installation Tool Prong Break-Off Tool Through-Hole Tap	Coarse	31 Ga.	0.120"	91732A901	000000


	288	1-64 Thread × 0.11" Installed Lg. (24 Inserts and 24 Screw-Locking Inserts) 2-56 Thread × 0.129" Installed Lg. (24 Inserts and 24 Screw-Locking Inserts) 3-48 Thread × 0.148" Installed Lg. (24 Inserts and 24 Screw-Locking Inserts) 4-40 Thread × 0.168" Installed Lg. (24 Inserts and 24 Screw-Locking Inserts) 6-32 Thread × 0.207" Installed Lg. (24 Inserts and 24 Screw-Locking Inserts) 8-32 Thread × 0.246" Installed Lg. (24 Inserts and 24 Screw-Locking Inserts) Drill Bits Installation Tools Through-Hole Taps	Coarse	5/64" 3/32" 36 Ga. 31 Ga. 26 Ga. 17 Ga.	0.078" 0.094" 0.107" 0.120" 0.147" 0.173"	90285A134	000000

Thread-Forming Locknuts

Form threads into these nuts for a tight fit that won't loosen under vibration. They are partially threaded, so when you fasten them onto metal screws, the tightening action will cut the rest of the threads. Nuts are not reusable.

Plastic

Nylon 6/6—Slippery and abrasion resistant, these nuts thread on smoothly and stand up to daily wear and tear. Nylon will swell and weaken when exposed to moisture, so it's best for dry environments.

	Wd.	Ht.	Pkg. Qty.		Pkg.
White Nylon 6/6



	4-40	1/4"	3/32"	100	94909A005	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

	4-40	0.112"	31 Ga.	0.120"	10	Drill Bit Installation Tool Through-Hole Tap	98356A114	0000000


	4-40	0.168"	31 Ga.	0.120"	10	Drill Bit Installation Tool Through-Hole Tap	91732A899	00000
	4-40	0.224"	31 Ga.	0.120"	10	Drill Bit Installation Tool Through-Hole Tap	91732A430	00000
	4-40	0.280"	31 Ga.	0.120"	10	Drill Bit Installation Tool Through-Hole Tap	98356A115	000000
	4-40	0.336"	31 Ga.	0.120"	10	Drill Bit Installation Tool Through-Hole Tap	98356A116	000000