IP8 Drive Screws | McMaster-Carr

Our strongest Torx Plus rounded head screws. Made of alloy steel, they have nearly twice the tensile strength of other screws. The button head looks similar to a pan head, but it's lower and more compact, taking up less space. With larger lobes than Torx drives, Torx Plus withstands even more torque without the driver slipping and stripping the drive.

Length is measured from under the head.

Black-Oxide Alloy Steel—Typically chosen for their appearance, these screws have a dark, matte coating to create a finished look. They offer minimal corrosion resistance, so they're best for dry environments.

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

		Head
	Lg.	Dia.	Ht.	Threading	Tensile Strength, psi	Specs. Met	Pkg. Qty.		Pkg.
Black-Oxide Alloy Steel







				4-40

				3/16"	0.213"	0.059"	Fully Threaded	120,000	ASME B18.3, ASTM F835	100	96452A456	000000


				1/4"	0.213"	0.059"	Fully Threaded	120,000	ASME B18.3, ASTM F835	100	96452A106	00000
				3/8"	0.213"	0.059"	Fully Threaded	120,000	ASME B18.3, ASTM F835	50	96452A108	0000
				1/2"	0.213"	0.059"	Fully Threaded	120,000	ASME B18.3, ASTM F835	50	96452A110	0000
				3/4"	0.213"	0.059"	Fully Threaded	120,000	ASME B18.3, ASTM F835	100	96452A530	00000




						M3 × 0.5 mm

						6 mm	5.7 mm	1.65 mm	Fully Threaded	110,000	ASME B18.3.4M	100	96452A711	00000


						8 mm	5.7 mm	1.65 mm	Fully Threaded	110,000	ASME B18.3.4M	100	96452A712	00000
						10 mm	5.7 mm	1.65 mm	Fully Threaded	110,000	ASME B18.3.4M	100	96452A713	00000


						Zinc-Plated Alloy Steel







										4-40

										3/16"	0.213"	0.059"	Fully Threaded	120,000	ASME B18.3, ASTM F835	50	90910A120	00000


										1/4"	0.213"	0.059"	Fully Threaded	120,000	ASME B18.3, ASTM F835	50	90910A123	00000
										1/2"	0.213"	0.059"	Fully Threaded	120,000	ASME B18.3, ASTM F835	100	90910A816	00000
										3/4"	0.213"	0.059"	Fully Threaded	120,000	ASME B18.3, ASTM F835	100	90910A817	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







				4-40

				3/16"	82°	Standard	0.212"	0.067"	Fully Threaded	60,000	ASME B18.3	50	92703A203	000000


				1/4"	82°	Standard	0.212"	0.067"	Fully Threaded	60,000	ASME B18.3	50	92703A205	00000
				5/16"	82°	Standard	0.212"	0.067"	Fully Threaded	60,000	ASME B18.3	50	92703A207	00000
				3/8"	82°	Standard	0.212"	0.067"	Fully Threaded	60,000	ASME B18.3	50	92703A209	00000
				1/2"	82°	Standard	0.212"	0.067"	Fully Threaded	60,000	ASME B18.3	50	92703A211	00000
				3/4"	82°	Standard	0.212"	0.067"	Fully Threaded	60,000	ASME B18.3	50	92703A213	00000
				1"	82°	Standard	0.212"	0.067"	Fully Threaded	60,000	ASME B18.3	50	92703A215	00000

Stainless Steel Button Head Torx Plus Screws

The most corrosion-resistant button head Torx Plus screws we offer. Made of stainless steel, they won't rust, but they're not as strong as alloy steel. The button head looks similar to a pan head, but it's lower and more compact, taking up less space. With larger lobes than Torx drives, Torx Plus withstands even more torque without the driver slipping and stripping the drive.

Length is measured from under 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.

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







				4-40

				1/8"	0.213"	0.059"	Fully Threaded	60,000	ASME B18.3	25	90910A783	000000


				3/16"	0.213"	0.059"	Fully Threaded	60,000	ASME B18.3	25	90910A710	00000
				1/4"	0.213"	0.059"	Fully Threaded	60,000	ASME B18.3	25	90910A712	00000
				5/16"	0.213"	0.059"	Fully Threaded	60,000	ASME B18.3	25	90910A714	00000
				3/8"	0.213"	0.059"	Fully Threaded	60,000	ASME B18.3	25	90910A716	00000
				1/2"	0.213"	0.059"	Fully Threaded	60,000	ASME B18.3	25	90910A718	00000

Steel Torx Plus Rounded Head Thread-Forming Screws for Soft Metal

The deep, six-lobe recess keeps drivers from slipping when installing these screws in soft metals such as brass, aluminum, and copper. Torx Plus drives withstand even more torque than Torx. Also known as Taptite® screws, these have a tri-lobular shank that presses threads into material for a tight fit. The unthreaded lead-in point starts threads cleanly and keeps the screw aligned in the hole. Their 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
	Lg., mm	Dia.	Ht.	Drive Size	Shank Cross Section	Pkg. Qty.		Pkg.
Zinc-Plated Steel







				M2.5 Screw Size

				3	5	2.1	IP8, T8	Tri-Lobe	25	94209A411	000000


				4	5	2.1	IP8, T8	Tri-Lobe	25	94209A412	00000
				5	5	2.1	IP8, T8	Tri-Lobe	25	94209A413	00000
				6	5	2.1	IP8, T8	Tri-Lobe	25	94209A414	00000
				8	5	2.1	IP8, T8	Tri-Lobe	25	94209A415	00000
				12	5	2.1	IP8, T8	Tri-Lobe	25	94209A417	00000

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. They're comparable to Plastite screws.

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







				M2.63 Screw Size

				4	5	2.1	TRS	IP8, T8	43 Ga.	Tri-Lobe	50	99397A344	000000


				5	5	2.1	TRS	IP8, T8	43 Ga.	Tri-Lobe	50	99397A347	00000
				6	5	2.1	TRS	IP8, T8	43 Ga.	Tri-Lobe	50	99397A349	00000
				8	5	2.1	TRS	IP8, T8	43 Ga.	Tri-Lobe	50	99397A351	00000
				10	5	2.1	TRS	IP8, T8	43 Ga.	Tri-Lobe	50	99397A354	00000
				12	5	2.1	TRS	IP8, T8	43 Ga.	Tri-Lobe	50	99397A356	00000
				14	5	2.1	TRS	IP8, T8	43 Ga.	Tri-Lobe	50	99397A359	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
	Lg., mm	Dia.	Ht.	Tapping Screw Type	Drive Size	Drill Bit Size	Shank Cross Section	Pkg. Qty.		Pkg.
Zinc-Plated Steel







				M2.5 Screw Size

				5	4.25	1.9	TRS	IP8, T8	45 Ga.	Round	25	96817A263	00000


				6	4.25	1.9	TRS	IP8, T8	45 Ga.	Round	25	96817A265	0000
				8	4.25	1.9	TRS	IP8, T8	45 Ga.	Round	25	96817A268	0000
				10	4.25	1.9	TRS	IP8, T8	45 Ga.	Round	25	96817A271	0000
				12	4.25	1.9	TRS	IP8, T8	45 Ga.	Round	25	96817A274	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







				M2.5 Screw Size

				5	4.25	1.9	TRS	IP8, T8	45 Ga.	Round	25	96817A890	00000


				6	4.25	1.9	TRS	IP8, T8	45 Ga.	Round	25	96817A892	0000
				8	4.25	1.9	TRS	IP8, T8	45 Ga.	Round	25	96817A894	0000
				10	4.25	1.9	TRS	IP8, T8	45 Ga.	Round	25	96817A896	00000
				12	4.25	1.9	TRS	IP8, T8	45 Ga.	Round	25	96817A899	00000

Steel Torx Plus Rounded Head Thread-Forming Screws for Plastic

Tri-Lobe Shank Cross

Section

A heavy hand won’t strip the drive on these screws as you thread them into plastic. The deep, six-lobe recess withstands even more torque than a Torx drive. These screws 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.

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

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







				M2.63 Screw Size

				3	5	2.1	TRS	IP8, T8	43 Ga.	Tri-Lobe	50	99397A411	000000


				4	5	2.1	TRS	IP8, T8	43 Ga.	Tri-Lobe	50	99397A412	00000
				5	5	2.1	TRS	IP8, T8	43 Ga.	Tri-Lobe	50	99397A413	00000
				6	5	2.1	TRS	IP8, T8	43 Ga.	Tri-Lobe	50	99397A414	00000
				8	5	2.1	TRS	IP8, T8	43 Ga.	Tri-Lobe	50	99397A415	00000
				10	5	2.1	TRS	IP8, T8	43 Ga.	Tri-Lobe	50	99397A416	00000
				12	5	2.1	TRS	IP8, T8	43 Ga.	Tri-Lobe	50	99397A417	00000
				14	5	2.1	TRS	IP8, T8	43 Ga.	Tri-Lobe	50	99397A583	00000

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. 4 Screw Size

				1/4"	0.212"	0.067"	TRS	IP8, T8	20	82°	Standard	37 Ga.	Tri-Lobe	50	95893A601	000000


				3/8"	0.212"	0.067"	TRS	IP8, T8	20	82°	Standard	37 Ga.	Tri-Lobe	50	95893A605	00000
				1/2"	0.212"	0.067"	TRS	IP8, T8	20	82°	Standard	37 Ga.	Tri-Lobe	50	95893A615	00000

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. 4 Screw Size

				1/4"	0.212"	0.067"	TRS	IP8, T8	20	82°	Standard	44 Ga.	Tri-Lobe	50	95893A212	00000


				3/8"	0.212"	0.067"	TRS	IP8, T8	20	82°	Standard	44 Ga.	Tri-Lobe	50	95893A215	0000
				1/2"	0.212"	0.067"	TRS	IP8, T8	20	82°	Standard	44 Ga.	Tri-Lobe	50	95893A218	0000

Torque-Limiting Key Sets


L-Key	T-Handle

The assorted keys in these sets have a small handle that prevents you from generating too much torque when turning a fastener. They are often used to install carbide inserts in cutting tools.

T-Handle—These keys have a wider handle than L-keys, so they're easier to grip.

Black-Oxide Steel—The coating offers minimal corrosion resistance, so these keys are best for dry environments.

Black Phosphate-Coated Steel—These keys resist rust in most wet and outdoor applications, however, they won't hold up to salt water and chemicals.

	Grip Style	Container Type		Each
Torx Plus







	L-Key

	7	IP6 Torx Plus Flag-Handle Key (3 5/16" O'all Lg.) IP7 Torx Plus Flag-Handle Key (3 5/16" O'all Lg.) IP8 Torx Plus Flag-Handle Key (3 5/16" O'all Lg.) IP9 Torx Plus Flag-Handle Key (3 5/16" O'all Lg.) IP10 Torx Plus Flag-Handle Key (3 1/2" O'all Lg.) IP15 Torx Plus Flag-Handle Key (3 1/2" O'all Lg.) IP20 Torx Plus Flag-Handle Key (3 1/2" O'all Lg.)	Black Phosphate-Coated Steel	Cushion	Plastic Stand	7974A28	000000




			T-Handle

			7	IP6 Torx Plus T-Handle Key (5 7/8" O'all Lg.) IP7 Torx Plus T-Handle Key (5 7/8" O'all Lg.) IP8 Torx Plus T-Handle Key (5 7/8" O'all Lg.) IP9 Torx Plus T-Handle Key (5 7/8" O'all Lg.) IP10 Torx Plus T-Handle Key (5 7/8" O'all Lg.) IP15 Torx Plus T-Handle Key (5 7/8" O'all Lg.) IP20 Torx Plus T-Handle Key (5 7/8" O'all Lg.)	Black-Oxide Steel	Cushion	Metal Stand	7273A62	00000

Torx Plus Bit Sets


Hex Shank	Quick-Change Hex Shank

With larger lobes, the bits in these sets deliver more torque than Torx bits without slipping and stripping the drive. They have a similar profile to Torx but are not recommended for use with standard Torx screws.

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.

	Adapters Included	Material	Container Type		Each
For Hand Tools







	1/4" Hex Shank Size

	11	1 Adapter 10 Bits	Torx Plus: IP7, IP8, IP9, IP10, IP15, IP20, IP25, IP27, IP30, IP40 (1" O'all lg.)	2 3/8" Lg. Bit Adapter for Power Tools	Steel	Plastic Case	54305A43	000000


	For Power Tools







					1/4" Quick-Change Hex Shank Size

					10	10 Bits	Torx Plus: IP6, IP7, IP8, IP9, IP10, IP15, IP20, IP25, IP27, IP30 (2" O'all Lg.)	—	Steel	Plastic Caddy	3716A36	00000

Screwdriver Sets

Keep a selection of screwdrivers on hand to turn fasteners of any size. The handles are made from a combination of soft, grippy plastic for high torque and smooth, hard plastic for quick grip adjustments and high-speed turning. They're also contoured to maximize comfort and minimize hand strain, fatigue, and blisters, even with extended use.

Premium—The best screwdrivers available, with tips machined to tight tolerances for the tightest possible fit in fastener recesses. The snug fit means they'll turn screws quickly without wearing screw heads and the driver's tip.

	Mfr.		Each
Torx Plus







	Premium

	7	IP8 Torx Plus Screwdriver—6 3/4" O'all Lg. IP10 Torx Plus Screwdriver—7 1/2" O'all Lg. IP15 Torx Plus Screwdriver—7 1/2" O'all Lg. IP20 Torx Plus Screwdriver—8 1/4" O'all Lg. IP25 Torx Plus Screwdriver—8 1/4" O'all Lg. IP30 Torx Plus Screwdriver—9 1/4" O'all Lg. IP40 Torx Plus Screwdriver—10" O'all Lg.	Chrome-Plated Steel	Wiha	5259A31	000000

L-Key Sets

Plastic

Caddy

Keep the most common L-key sizes in one portable set so the right size is always ready. These L-keys are precision manufactured to tight tolerances for an exact fit.

Alloy Steel—These L-keys handle high torque without bending or breaking, so they’ll last a lifetime.

Short—A short long leg fits into tight spaces where you have less room to swing, making these ideal for confined areas.

	Finish	Container Type		Each
Alloy Steel







	Torx Plus

	9	IP8, IP9, IP10, IP15, IP20, IP25, IP27, IP30, IP40	Short	Black Oxide	Plastic Caddy	3726A36	000000

Factory-Set Torque Screwdrivers for Carbide Inserts


For Torx Plus Drives	Torx Plus Drive

Ensure carbide inserts are tightened to the correct torque. These tools are factory set to the recommended torque values for each screw size and cannot be adjusted. They signal with an audible click when the set torque is reached. The handle has a contoured ultra grip for comfort.

						Shaft		Material
	Drive Size	Torque Setting	Clockwise Accuracy	Torque-Limiting Direction	Overall Lg.	Lg.	Overall Wd.	Shaft	Handle	Grip Style		Each
For Torx Plus Drives







				ft·lbf, N-m

				IP8	0.9 ft·lbf 1.2 N-m	±10%	Clockwise	6 3/4"	2 9/16"	7/32"	Steel	Plastic	Ultra Grip	2789N22	000000

Screwdrivers

A staple in any toolbox, these are your go-to screwdrivers for routine maintenance and repair. The handle is made from a combination of soft, grippy plastic for high torque and smooth, hard plastic for quick grip adjustments and high-speed turning. It's also contoured to maximize comfort and minimize hand strain, fatigue, and blisters, even with extended use.

Standard Length—The most common screwdriver length for a specific drive size.

				Shaft
	Drive Size	Relative Lg.	Overall Lg.	Lg.	Overall Wd.	Material	Mfr.		Each
Torx Plus







				Premium

				IP8	Standard	6 3/4"	2 7/16"	5/32"	Chrome-Plated Steel	Wiha	5259A13	00000

Torx Plus Bits

Hex Shank

Quick-Change Hex

Shank

With larger lobes than Torx bits, these deliver even more torque without slipping and stripping the drive. They have a similar profile to Torx but are not recommended for use with standard Torx screws.

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

	IP8	1"	Steel	54305A13	00000


	For Power Tools







					1/4" Quick-Change Hex Shank Size

					IP8	2"	Steel	3716A11	0000

L-Keys

The highest quality L-keys you can buy for tightening and loosening screws. Our L-keys are precision manufactured to tight tolerances for an exact fit.

Alloy Steel—These L-keys handle high torque without bending or breaking, so they’ll last a lifetime.

Short—A short long leg fits into tight spaces where you have less room to swing, making these ideal for confined areas.

Long—The most common option, these L-keys have a balanced length for everyday reach and torque.

		Length					Each		Package
	Drive Size	Overall	Relative	Long Leg	Short Leg	Finish		Each	Pkg. Qty.		Pkg.
Alloy Steel







				Torx Plus

				IP8	1 7/8"	Short	1 3/4"	5/8"	Black Oxide	3726A13	00000	10	3726A131	000000


				IP8	3 1/16"	Long	3"	5/8"	Black Oxide	3726A25	0000	10	3726A251	00000

Torque-Limiting Keys

L-Key

T-Handle

Often used to install carbide inserts in cutting tools, these keys have a small handle that prevents you from generating too much torque when turning a fastener.

T-Handle—These keys have a wider handle than L-keys, so they're easier to grip.

Black-Oxide Steel—The coating offers minimal corrosion resistance, so these keys are best for dry environments.

Black Phosphate-Coated Steel—These keys resist rust in most wet and outdoor applications, however, they won't hold up to salt water and chemicals.

	Grip Style		Each
Torx Plus







	L-Key

	IP8	3 5/16"	Black Phosphate-Coated Steel	Cushion	7974A23	00000




			T-Handle

			IP8	2 3/4"	Black-Oxide Steel	Cushion	7273A14	0000