M2 Taps | McMaster-Carr

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16 Products

For Threading

Fastener Threads

Thread holes for screws, bolts, and rods

14 products

Helical Insert Threads

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

2 products

Performance

Chip Clearing

Prevent buildup to protect the threads and the tap

3 products

Material

High-Speed Steel

Versatile taps resist heat and wear to stay sharp

15 products

Taps

Cut threads into holes so screws, bolts, and rods fit snugly. Our basic taps have straight flutes that are good for most jobs.

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

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.

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.

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, mm	Decimal Size Equiv.	Shank Type		Each		Each		Each	No. of Taps		Each
High-Speed Steel







				Uncoated

				M2 × 0.4 mm	7/16"	1 3/4"	Metric	3	1.6	0.063"	Square	0000000	000000	0000000	000000	0000000	000000	3	00000000	000000




						Titanium Nitride (TiN) Coated

						M2 × 0.4 mm	7/16"	1 3/4"	Metric	2	1.6	0.063"	Square	00000000	00000	00000000	00000	00000000	00000	3	00000000	00000


						Cobalt Steel







										Uncoated

										M2 × 0.4 mm	7/16"	1 13/16"	Metric	3	1.6	0.063"	Square	———	0	0000000	00000	———	0	—	———	0

Chip-Clearing Taps

Spiral-Point Flute for Through 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.

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, mm	Decimal Size Equiv.	Shank Type	Chamfer Type	No. of Flutes		Each
High-Speed Steel







				Uncoated

				M2 × 0.4 mm	7/16"	1 3/4"	Metric	1.6	0.063"	Square	Plug	2	0000000	000000




						Titanium Nitride (TiN) Coated

						M2 × 0.4 mm	7/16"	1 3/4"	Metric	1.6	0.063"	Square	Plug	2	0000000	00000




								Titanium Carbon Nitride (TiCN) Coated

								M2 × 0.4 mm	7/16"	1 3/4"	Metric	1.6	0.063"	Square	Plug	2	0000000	00000

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.

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



		3	M2	Metric	Plastic Case	3	Square	00000000	000000


		Titanium Nitride (TiN) Coated



				3	M2	Metric	Plastic Case	2	Square	00000000	00000

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			Bottoming Chamfer
	Thread Size	Thread Lg.	Overall Lg.	Thread Type	No. of Flutes	Size, mm	Decimal Size Equiv.	Shank Type		Each
High-Speed Steel







				Uncoated

				M2 × 0.4 mm	7/16"	1 3/4"	Metric	0	1.8	0.0709"	Square	00000000	000000




						Titanium Nitride (TiN) Coated

						M2 × 0.4 mm	7/16"	1 3/4"	Metric	0	1.8	0.0709"	Square	00000000	00000

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, mm	Decimal Size Equiv.	Shank Type		Each		Each
High-Speed Steel







				Uncoated

				M2	1/2"	1 13/16"	Metric	3	2.1	0.0827"	Square	000000000	0000000	000000000	0000000