T3 Drive Screws | McMaster-Carr

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37 Products

About Tapping Screws

Compare drilling, pointed, thread-forming, and thread-cutting tips to find the best choice for your material.

Stainless Steel Torx Plus Rounded Head Thread-Forming Screws for Plastic

Tri-Lobe Shank Cross

Section

Neither moisture nor a heavy hand can damage these screws. The deep, six-lobe recess withstands even more torque than a Torx drive to prevent slipping as you install screws in plastic. They press threads into molded or cast holes and won’t crack or distort the material. Use them to fasten plastic components, enclosures, and panels. The rounded head creates a finished look.

Length is measured from under the head.

18-8 Stainless Steel—The choice for wet and outdoor environments, these screws resist rust. However, they won't hold up to the harsh chemicals that 316 stainless steel can.

Tri-Lobe—The tri-lobular shank forms threads in thermoplastics such as polypropylene and ABS. These screws displace material to create a tight fit that resists vibration and prevents backing out. Because the shank isn’t round, the diameter will vary slightly depending on where you measure it. Also known as Plastite® screws.

		Head
	Lg.	Dia.	Ht.	Tapping Screw Type	Drive Size	Approx. Threads per In.	Drill Bit Size	Shank Cross Section	Pkg. Qty.		Pkg.
18-8 Stainless Steel







				No. 00 Screw Size

				3/32"	0.09"	0.038"	TRS	IP3, T3	51	59 Ga.	Tri-Lobe	25	96001A050	000000


				1/8"	0.09"	0.038"	TRS	IP3, T3	51	59 Ga.	Tri-Lobe	25	96001A053	00000
				3/16"	0.09"	0.038"	TRS	IP3, T3	51	59 Ga.	Tri-Lobe	25	96001A056	00000
				1/4"	0.09"	0.038"	TRS	IP3, T3	51	59 Ga.	Tri-Lobe	25	96001A059	00000

Steel Torx Plus Rounded Head Thread-Forming Screws for Thin-Walled Holes in Plastic

Thread these screws into thin-walled holes without damaging the drive or your workpiece. The deep, six-lobe recess withstands more torque than a Torx drive to prevent slipping. These screws have narrow-angle threads that prevent cracking and discoloration in molded plastics, such as ABS, PVC, and polycarbonate. The rounded head creates a finished look.

Length is measured from under the head.

Zinc-Plated Steel—A common choice for areas with occasional exposure to moisture.

			Head, mm
	Style	Lg., mm	Dia.	Ht.	Tapping Screw Type	Drive Size	Drill Bit Size	Shank Cross Section	Pkg. Qty.		Pkg.
Zinc-Plated Steel







				M1.2 Screw Size

				A	2	2.175	0.95	TRS	IP3, T3	62 Ga.	Round	25	96817A031	000000


				A	3	2.175	0.95	TRS	IP3, T3	62 Ga.	Round	25	96817A034	00000
				A	4	2.175	0.95	TRS	IP3, T3	62 Ga.	Round	25	96817A036	00000
				A	5	2.175	0.95	TRS	IP3, T3	62 Ga.	Round	25	96817A039	00000




						M1.4 Screw Size

						A	3	2.35	1.15	TRS	IP3, T3	56 Ga.	Round	25	96817A082	0000


						A	4	2.35	1.15	TRS	IP3, T3	56 Ga.	Round	25	96817A085	0000
						A	5	2.35	1.15	TRS	IP3, T3	56 Ga.	Round	25	96817A088	0000
						A	6	2.35	1.15	TRS	IP3, T3	56 Ga.	Round	25	96817A090	0000

Stainless Steel Torx Plus Rounded Head Thread-Forming Screws for Thin-Walled Holes in Plastic

These corrosion-resistant screws thread into thin plastic without damaging the drive or your workpiece. The deep, six-lobe recess withstands more torque than a Torx drive to prevent slipping. These screws have narrow-angle threads that prevent cracking and discoloration in molded plastics, such as ABS, PVC, and polycarbonate. The rounded head creates a finished look.

Length is measured from under the head.

18-8 Stainless Steel—The choice for wet and outdoor environments, these screws resist rust. However, they won't hold up to the harsh chemicals that 316 stainless steel can.

		Head, mm
	Lg., mm	Dia.	Ht.	Tapping Screw Type	Drive Size	Drill Bit Size	Shank Cross Section	Pkg. Qty.		Pkg.
18-8 Stainless Steel







				M1.2 Screw Size

				2	2.175	0.95	TRS	IP3, T3	62 Ga.	Round	25	96817A742	000000


				3	2.175	0.95	TRS	IP3, T3	62 Ga.	Round	25	96817A744	00000
				4	2.175	0.95	TRS	IP3, T3	62 Ga.	Round	25	96817A746	00000
				5	2.175	0.95	TRS	IP3, T3	62 Ga.	Round	25	96817A748	00000




						M1.4 Screw Size

						3	2.35	1.15	TRS	IP3, T3	56 Ga.	Round	25	96817A780	00000


						4	2.35	1.15	TRS	IP3, T3	56 Ga.	Round	25	96817A783	00000
						5	2.35	1.15	TRS	IP3, T3	56 Ga.	Round	25	96817A785	00000
						6	2.35	1.15	TRS	IP3, T3	56 Ga.	Round	25	96817A787	00000

Stainless Steel Torx Plus Flat Head Screws

The most corrosion-resistant Torx Plus flat head screws we offer. Made of stainless steel, they won't rust or corrode when exposed to moisture and chemicals, but they're not as strong as alloy steel. With larger lobes than Torx drives, Torx Plus withstands even more torque without slipping and stripping the drive.

Length is measured from the top of the head.

18-8 Stainless Steel—The choice for wet and outdoor environments, these screws won't rust. However, they don't hold up to the harsh chemicals that 316 stainless steel can.

Standard Profile—Standard-profile heads are the most common choice for flat head screws.

				Head
	Lg.	Countersink Angle	Flat Head Profile	Dia.	Ht.	Threading	Tensile Strength, psi	Specs. Met	Pkg. Qty.		Pkg.
18-8 Stainless Steel







				0-80

				1/8"	82°	Standard	0.138"	0.044"	Fully Threaded	60,000	ASME B18.3	100	92703A110	00000


				3/16"	82°	Standard	0.138"	0.044"	Fully Threaded	60,000	ASME B18.3	100	92703A112	0000
				1/4"	82°	Standard	0.138"	0.044"	Fully Threaded	60,000	ASME B18.3	100	92703A113	0000

Stainless Steel Torx Plus Flat Head Thread-Forming Screws for Plastic

Tri-Lobe Shank Cross

Section

These corrosion-resistant screws give you the best grip while fastening components with countersunk holes. With larger lobes than Torx drive, Torx Plus handles even more torque to prevent slipping and stripping the drive. These screws press threads into molded or cast holes, so you can fasten plastic components, enclosures, and panels without using an insert. Their flat, beveled head sits flush in the hole.

18-8 Stainless Steel—The choice for wet and outdoor environments, these screws resist rust. However, they won't hold up to the harsh chemicals that 316 stainless steel can.

		Head
	Lg.	Dia.	Ht.	Tapping Screw Type	Drive Size	Approx. Threads per In.	Countersink Angle	Flat Head Profile	Drill Bit Size	Shank Cross Section	Pkg. Qty.		Pkg.
18-8 Stainless Steel







				No. 0 Screw Size

				3/16"	0.112"	0.035"	TRS	IP3, T3	42	82°	Standard	55 Ga.	Tri-Lobe	50	95893A501	000000


				1/4"	0.112"	0.035"	TRS	IP3, T3	42	82°	Standard	55 Ga.	Tri-Lobe	50	95893A505	00000
				3/8"	0.112"	0.035"	TRS	IP3, T3	42	82°	Standard	55 Ga.	Tri-Lobe	50	95893A510	00000

Precise-Control Screwdriver Sets

Plain Grip

Make fine-tuned adjustments on a variety of small, delicate components, such as electronics, miniature models, and microscopes. These screwdriver sets give you better control than a standard screwdriver to avoid stripping tiny screws or cracking fragile materials. Press the end of the handle with your palm to apply constant pressure while turning the body of the screwdriver with your fingertips. They are also known as precision and miniature screwdrivers.

Black-Oxide Steel—These screwdrivers withstand occasional moisture.

Chrome-Plated Steel—The bright, shiny plating resists salt water and chemicals better than other finishes and is less likely to wear off.

Plain Grip—Made of hard plastic for durability.

	Includes	Material	Grip Style	Container Type		Each
Torx



	4	T1 Torx Screwdriver—4 15/16" O'all Lg. T2 Torx Screwdriver—4 15/16" O'all Lg. T3 Torx Screwdriver—4 15/16" O'all Lg. T4 Torx Screwdriver—4 15/16" O'all Lg.	Black-Oxide Steel	Plain	Plastic Pouch	52995A31	000000


	Hex, Phillips, Slotted, Torx



			50	5 3/4" Lg. Chip Lifter Hex Screwdrivers: 0.028", 0.035", 0.050", 1/16", 5/64", 3/32", 7/64", 1/8", 9/64", 5/32" Hex Screwdrivers: 1.27 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm Nutdrivers: 1.5 mm, 1.8 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, 5.5 mm Phillips Screwdrivers: No. 000, No. 00, No. 0, No. 1 Slotted Screwdrivers: 1/32", 0.039", 3/64", 1/16", 0.070", 5/64", 3/32", 1/8", 9/64", 5/32" Torx Screwdrivers: T1, T2, T3, T4, T5, T6, T7, T8, T9, T10	Chrome-Plated Steel	Plain	Metal Stand	52985A94	000000

Steel Torx Plus Flat Head Thread-Forming Screws for Plastic

Tri-Lobe Shank Cross

Section

Get the best grip while fastening components that have countersunk holes. With larger lobes than Torx drive, Torx Plus handles even more torque to prevent slipping and stripping the drive. These screws press threads into molded or cast holes, so you can fasten plastic components, enclosures, and panels without using an insert. Their flat, beveled head sits flush in the hole.

Length is measured from under the head.

Zinc-Plated Steel—A common choice for areas with occasional exposure to moisture.

		Head
	Lg.	Dia.	Ht.	Tapping Screw Type	Drive Size	Approx. Threads per In.	Countersink Angle	Flat Head Profile	Drill Bit Size	Shank Cross Section	Pkg. Qty.		Pkg.
Zinc-Plated Steel







				No. 0 Screw Size

				3/16"	0.112"	0.035"	TRS	IP3, T3	42	82°	Standard	56 Ga.	Tri-Lobe	50	95893A113	000000


				1/4"	0.112"	0.035"	TRS	IP3, T3	42	82°	Standard	56 Ga.	Tri-Lobe	50	95893A116	00000
				3/8"	0.112"	0.035"	TRS	IP3, T3	42	82°	Standard	56 Ga.	Tri-Lobe	50	95893A119	00000

Static-Control Precise-Control Screwdriver Sets

Protect delicate microelectronics from harmful static shocks. Also known as ESD-safe screwdrivers, these meet IEC requirements to drain static away from your workpiece before it causes damage. Precise-control screwdrivers allow for nimble, fine-tuned adjustments. Press the end of the handle with your palm to apply constant pressure while turning the body of the screwdriver with your fingertips.

Warning: These screwdrivers conduct electricity. Do not use them near active power sources.

Chrome-Plated Steel—The bright, shiny plating resists salt water and chemicals better than other finishes and is less likely to wear off.

Plain Grip—Made of hard plastic for durability.

	Includes	Material	Grip Style	Container Type	Static Control Rating	Surface Resistivity	Specs. Met		Each
Hex, Phillips, Slotted, Torx



	50	5 3/4" Lg. Chip Lifter Hex Screwdrivers: 0.7 mm, 0.9 mm, 1.3 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm Hex Screwdrivers: 1/16", 3/32", 7/64", 1/8" Nutdrivers: 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, 5.5 mm, 1/8", 5/32", 3/16", 1/4" Phillips Screwdrivers: No. 000, No. 00, No. 0, No. 1 Slotted Screwdrivers: 0.031", 0.039", 0.047", 0.059", 0.079", 0.098", 0.118", 0.138", 0.157" Torx Screwdrivers: T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T15, T20	Chrome-Plated Steel	Plain	Metal Stand	Static Dissipative	1× 10^6Ω⋅cm to 1× 10^9Ω⋅cm	IEC 61340-5-1	7440A95	0000000

Torx Bits

Hex Shank

For Power Tools

Get a grip with less slip. These bits have a six-lobe shape that grips fasteners so they won't slip and damage the drive. Also known as star bits.

Hex Shank—Also known as insert bits, these snap into hand tools. If you want to use them with power tools, attach a bit adapter (not included).

Quick-Change Hex Shank—Lock these bits directly into power tools. They won't wobble as much as bits paired with an adapter, so they are the best choice for high-precision tasks.

Steel—Best for dry environments, since moisture will cause these bits to rust.

		Each
For Hand Tools







	1/4" Hex Shank Size

	T3	1"	Steel	7013A16	00000




			4 mm Hex Shank Size

			T3	1 1/8"	Steel	7013A61	0000


			For Power Tools







							1/4" Quick-Change Hex Shank Size

							T3	2"	Steel	7396A13	0000

Precise-Control Screwdrivers

Plain Grip

Make fine-tuned adjustments on small, delicate components, such as electronics, miniature models, and microscopes. These screwdrivers give you better control than a standard screwdriver to avoid stripping tiny screws or cracking fragile materials. Press the end of the handle with your palm to apply constant pressure while turning the body of the screwdriver with your fingertips. They are also known as precision and miniature screwdrivers.

Chrome-Plated Steel—The bright, shiny plating resists salt water and chemicals better than other finishes and is less likely to wear off.

Plain Grip—Made of hard plastic for durability.

			Shaft
	Drive Size	Overall Lg.	Lg.	Overall Wd.	Grip Style		Each
Torx







				Chrome-Plated Steel

				T3	4 3/4"	1 5/8"	1/8"	Plain	52995A26	00000

Static-Control Precise-Control Screwdrivers

Protect delicate microelectronics from harmful static shocks. Also known as ESD-safe screwdrivers, they drain static away from your workpiece before it causes damage. Precise-control screwdrivers allow for nimble, fine-tuned adjustments. Press the end of the handle with your palm to apply constant pressure while turning the body of the screwdriver with your fingertips.

Warning: These screwdrivers conduct electricity. Do not use them near active power sources.

Chrome-Plated Steel—The bright, shiny plating resists salt water and chemicals better than other finishes and is less likely to wear off.

Plain Grip—Made of hard plastic for durability.

Static Dissipative—Drain static charges faster than antistatic screwdrivers. They meet IEC requirements for preventing the buildup of electrostatic discharge.

			Shaft
	Drive Size	Overall Lg.	Lg.	Overall Wd.	Grip Style	Static Control Rating	Surface Resistivity	Specs. Met		Each
Torx







				Chrome-Plated Steel

				T3	5 5/16"	1 5/8"	3/32"	Plain	Static Dissipative	1× 10^6Ω⋅cm to 1× 10^9Ω⋅cm	IEC 61340-5-1	7440A53	000000