M3.5 Taps | McMaster-Carr

Uncoated High-Speed Steel Tap—Uncoated high-speed steel taps have a longer tool life than carbon steel. They are strong enough for most jobs but don’t last as long as other high-speed steel taps. Use them for small-scale jobs.

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.

Uncoated High-Speed Steel Drill Bit—Uncoated high-speed steel drill bits have a longer tool life than carbon steel. They are strong enough for most jobs but don’t last as long as other high-speed steel drill bits. Use them for small-scale jobs.

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


	16	Plug	1 each of sizes: M3 × 0.50 mm M3.5 × 0.60 mm M4 × 0.70 mm M5 × 0.80 mm M6 × 1.00 mm M8 × 1.25 mm M10 × 1.50 mm M12 × 1.75 mm	1 15/16" 2" 2 1/8" 2 3/8" 2 1/2" 2 3/4" 2 15/16" 3 3/8"	Metric	3, 4	D3, D4, D5, D6	2.5 mm 2.9 mm 3.3 mm 4.2 mm 5.0 mm 6.75 mm 8.5 mm 10.25 mm	Black-Oxide High-Speed Steel	Plastic Pouch	0000000	0000000
	18	Plug	1 each of sizes: M2.5 × 0.45 mm M3 × 0.50 mm M3.5 × 0.60 mm M4 × 0.70 mm M5 × 0.80 mm M6 × 1.00 mm M8 × 1.25 mm M10 × 1.50 mm M12 × 1.75 mm	1 3/4" 1 15/16" 2" 2 1/8" 2 3/8" 2 1/2" 2 23/32" 2 15/16" 3 3/8"	Metric	3, 4	D3, D4, D5, D6	2.05 mm 2.5 mm 2.9 mm 3.3 mm 4.2 mm 5.0 mm 6.7 mm 8.5 mm 10.2 mm	Uncoated High-Speed Steel	Metal Case	00000000	000000

Chip-Clearing Tap and Drill Bit Sets for Through Holes

Also known as gun taps, the taps in these sets have spiral-point flutes that push chips ahead of the tap and out of through holes. Because they don't need to be reversed to prevent buildup, they produce threads more efficiently than standard taps and are suitable for production work. Taps have a square shank for compatibility with tap wrenches and tap holders for drill presses and milling machines. With a plug chamfer, they have 3-5 chamfered cutting threads, so they're suitable for start-to-finish tapping. All taps and drill bits are made of high-speed steel for use on most metal and plastic.

	Chamfer Type	Tap Sizes Included	Overall Lg.	Thread Type	No. of Flutes	Pitch Dia. Limit	Drill Bit Sizes Included	Drill Bit Material	Container Type		Each
Gold-Oxide High-Speed Steel Tap


	18	Plug	M2.5 × 0.45 mm M3 × 0.5 mm M3.5 × 0.6 mm M4 × 0.7 mm M5 × 0.8 mm M6 × 1.00 mm M8 × 1.25 mm M10 × 1.5 mm M12 × 1.75 mm	1 13/16" 1 15/16" 2" 2 1/8" 2 3/8" 2 1/2" 2 23/32" 2 15/16" 3 3/8"	Metric	2, 3	D3, D4, D5, D6	2.05 mm 2.5 mm 2.9 mm 3.3 mm 4.2 mm 5 mm 6.7 mm 8.5 mm 10.2 mm	Gold-Oxide High-Speed Steel	Metal Case	00000000	0000000

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.

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
				M3.5 × 0.6 mm	11/16"	2"	Metric	3	2.9	0.1142"	Square	0000000	000000	0000000	000000	0000000	000000	3	00000000	000000



						Titanium Nitride (TiN) Coated
						M3.5 × 0.6 mm	11/16"	2"	Metric	3	2.9	0.1142"	Square	00000000	00000	00000000	00000	00000000	00000	3	00000000	00000

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
				M3.5 × 0.6 mm	11/16"	2"	Metric	2.9	0.1142"	Square	Plug	2	0000000	000000



						Titanium Nitride (TiN) Coated
						M3.5 × 0.6 mm	11/16"	2"	Metric	2.9	0.1142"	Square	Plug	2	00000000	00000



								Titanium Carbon Nitride (TiCN) Coated
								M3.5 × 0.6 mm	11/16"	2"	Metric	2.9	0.1142"	Square	Plug	2	00000000	00000

Chip-Clearing Taps for Steel and Stainless Steel

Spiral-Point Flute for Through Holes

Image of ProductInUse. Front orientation. Contains Annotated. Taps. Chip-Clearing Taps for Steel and Stainless Steel, Spiral Flute for Blind 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.

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.

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





				Black Oxide
				M3.5 × 0.6 mm	3/8"	2"	Metric	Plug	2	2.9	0.1142"	Square	0000000	000000	0000000	000000

Chip-Clearing Taps for Aluminum, Brass, and Bronze

Spiral Flute for Through 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.

Spiral Flute for Through Holes—Left-hand flutes push chips ahead of the tap and out of through 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
	Thread Size	Thread Lg.	Overall Lg.	Thread Type	Size, mm	Decimal Size Equiv.	Shank Type	Chamfer Type	No. of Flutes		Each
Cobalt Steel





				Titanium Nitride (TiN) Coated/Chromium Carbide (CrC) Coated
				M3.5 × 0.6 mm	11/32"	2 13/64"	Metric	2.9	0.1142"	Square	Plug	2	0000000	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	Chamfer Type	No. of Flutes	Size, mm	Decimal Size Equiv.	Shank Type		Each		Each
Cobalt Steel





				Black Oxide
				M3.5 × 0.6 mm	3/8"	2"	Metric	Plug	3	2.9	0.1142"	Square	0000000	000000	0000000	000000

Long-Reach Taps

Thread holes that are hard to access or where obstructions make it difficult to turn a tap wrench. About twice as long other taps, these get you inside machines or through assemblies such as pulleys and belts. They 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.

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





				Uncoated
				M3.5 × 0.6 mm	11/16"	6"	Metric	3	32 Ga.	0.116"	Square	0.141"	00000000	000000	00000000	000000

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.

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		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
High-Speed Steel





				Uncoated
				M3.5 × 0.6 mm	11/16"	6"	Metric	32 Ga.	0.116"	Square	0.141"	Plug	2	0000000	000000

Oversized Taps

Cut slightly oversized threads to create space for plating and compensate for heat treatments that shrink threads. These taps have a pitch diameter that’s 0.0055" larger than standard taps. Their straight flutes 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.

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

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





				Uncoated
				M3.5 × 0.6 mm	11/16"	2"	Metric	3	2.9	0.114"	Square	00000000	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, mm	Decimal Size Equiv.	Shank Type	Chamfer Type	No. of Flutes		Each
High-Speed Steel





				Uncoated
				M3.5 × 0.6 mm	11/16"	2"	Metric	2.9	0.1142"	Square	Plug	2	00000000	000000

Hex-Bit Taps

You only need one tool to turn these taps and install screws. The _1/4" hex shank fits hand or powered screwdrivers for threading holes. Then switch to a screwdriver bit to finish the job. To tap in hard-to-reach spots, add a bit extension. 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.

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

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





				Uncoated
				M3.5 × 0.6 mm	3/8"	1 5/16"	Metric	3	2.9	0.1142"	Hex	1/4"	0000000	000000

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	Container Type	No. of Flutes	Shank Type		Each
Uncoated


		3	M3.5, Metric	Plastic Case	3	Square	00000000	000000

		Titanium Nitride (TiN) Coated


				3	M3.5, Metric	Plastic Case	3	Square	00000000	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	Tap Sizes Included	Container Type	Shank Type		Each
Uncoated


		10	1 each of sizes M3 × 0.50 mm, M3.5 × 0.60 mm, M4 × 0.70 mm, M4.5 × 0.75 mm, M5 × 0.80 mm; M6 × 1.00 mm, M8 × 1.25 mm, M10 × 1.50 mm, M12 × 1.75 mm, and M16 × 2.00 mm; Metric	Metal Case	Square	00000000	0000000