19 mm Drive Screws | McMaster-Carr

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58 Products

Steel Socket Head Screws

Fully Threaded

Partially Threaded

Made of alloy steel, these screws are the standard for high-strength fastening. Use them in high-load applications such as dies, presses, and heavy equipment. The deep, six-point socket keeps the hex key from slipping out and damaging 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.

Blue-Dyed Zinc-Plated Alloy Steel—The distinctive blue color makes it easy to tell these metric-sized screws apart from inch screws.

		Head, mm
	Lg., mm	Dia.	Ht.	Threading	Thread Spacing	Tensile Strength, psi	Fastener Strength Grade/Class	Pkg. Qty.		Pkg.
Black-Oxide Alloy Steel







				M24 × 3 mm

				40	36	24	Fully Threaded	Coarse	170,000	Class 12.9	1	91290A091	00000


				45	36	24	Fully Threaded	Coarse	170,000	Class 12.9	1	91290A092	0000
				50	36	24	Fully Threaded	Coarse	170,000	Class 12.9	1	91290A093	0000
				55	36	24	Fully Threaded	Coarse	170,000	Class 12.9	1	91290A266	0000
				60	36	24	Fully Threaded	Coarse	170,000	Class 12.9	1	91290A869	0000
				65	36	24	Fully Threaded	Coarse	170,000	Class 12.9	1	91290A870	0000
				70	36	24	Fully Threaded	Coarse	170,000	Class 12.9	1	91290A871	0000
				75	36	24	Fully Threaded	Coarse	170,000	Class 12.9	1	91290A872	0000
				80	36	24	Fully Threaded	Coarse	170,000	Class 12.9	1	91290A873	0000
				90	36	24	Fully Threaded	Coarse	170,000	Class 12.9	1	91290A247	00000
				90	36	24	Partially Threaded	Coarse	170,000	Class 12.9	1	91290A874	0000


				100	36	24	Fully Threaded	Coarse	170,000	Class 12.9	1	91290A249	00000
				100	36	24	Partially Threaded	Coarse	170,000	Class 12.9	1	91290A875	0000
				110	36	24	Partially Threaded	Coarse	170,000	Class 12.9	1	91290A876	0000
				120	36	24	Partially Threaded	Coarse	170,000	Class 12.9	1	91290A877	0000
				130	36	24	Partially Threaded	Coarse	170,000	Class 12.9	1	91290A878	0000
				140	36	24	Partially Threaded	Coarse	170,000	Class 12.9	1	91290A879	0000
				150	36	24	Partially Threaded	Coarse	170,000	Class 12.9	1	91290A880	0000
				160	36	24	Partially Threaded	Coarse	170,000	Class 12.9	1	91290A094	0000
				180	36	24	Partially Threaded	Coarse	170,000	Class 12.9	1	91290A267	00000
				200	36	24	Partially Threaded	Coarse	170,000	Class 12.9	1	91290A096	00000


				220	36	24	Partially Threaded	Coarse	170,000	Class 12.9	1	91290A097	00000
				240	36	24	Partially Threaded	Coarse	170,000	Class 12.9	1	91290A269	00000
				260	36	24	Partially Threaded	Coarse	170,000	Class 12.9	1	91290A925	00000
				300	36	24	Partially Threaded	Coarse	170,000	Class 12.9	1	91290A098	00000




						M27 × 3 mm

						60	40	27	Fully Threaded	Coarse	170,000	Class 12.9	1	91290A271	0000


						70	40	27	Fully Threaded	Coarse	170,000	Class 12.9	1	91290A273	0000
						80	40	27	Fully Threaded	Coarse	170,000	Class 12.9	1	91290A275	0000
						100	40	27	Partially Threaded	Coarse	170,000	Class 12.9	1	91290A277	00000
						120	40	27	Partially Threaded	Coarse	170,000	Class 12.9	1	91290A279	00000
						140	40	27	Partially Threaded	Coarse	170,000	Class 12.9	1	91290A291	00000
						180	40	27	Partially Threaded	Coarse	170,000	Class 12.9	1	91290A292	00000
						200	40	27	Partially Threaded	Coarse	170,000	Class 12.9	1	91290A293	00000


						Blue-Dyed Zinc-Plated Alloy Steel







								M24 × 3 mm

								80	36	24	Partially Threaded	Coarse	170,000	Class 12.9	1	91502A301	00000


		90	36					24	Partially Threaded	Coarse	170,000	Class 12.9	1	91502A302	00000
		100	36					24	Partially Threaded	Coarse	170,000	Class 12.9	1	91502A303	00000

Steel Hex-Drive Flat Head Screws

Our strongest hex-drive flat head screws. They're made of alloy steel, so they have nearly twice the tensile strength of other screws. With six contact points, the hex drive withstands more torque than slotted and Phillips to securely grip your driver without slipping and stripping the drive.

Length is measured from the top of the head.

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

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

				Head, mm
	Lg., mm	Countersink Angle	Flat Head Profile	Dia.	Ht.	Threading	Tensile Strength, psi	Specs. Met	Certificate Type	Pkg. Qty.		Pkg.
Black-Oxide Alloy Steel







				M30 × 3.5 mm

				90	60°	Standard	49	19.6	Fully Threaded	120,000	DIN 7991	Material Certificate	1	91294A577	000000

Stainless Steel Socket Head Screws

Fully Threaded

Partially Threaded

These screws won't rust or corrode when exposed to moisture and chemicals. Their deep, six-point socket keeps hex keys from slipping out and damaging 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 screws can.

		Head, mm
	Lg., mm	Dia.	Ht.	Threading	Thread Spacing	Tensile Strength, psi	Pkg. Qty.		Pkg.
18-8 Stainless Steel







				M24 × 3 mm

				50	36	24	Fully Threaded	Coarse	70,000	1	91292A282	000000


				60	36	24	Fully Threaded	Coarse	70,000	1	91292A277	00000
				70	36	24	Fully Threaded	Coarse	70,000	1	90696A147	00000
				80	36	24	Fully Threaded	Coarse	70,000	1	91292A278	00000
				90	36	24	Partially Threaded	Coarse	70,000	1	90696A148	00000
				100	36	24	Partially Threaded	Coarse	70,000	1	91292A279	00000
				120	36	24	Partially Threaded	Coarse	70,000	1	90696A151	00000

Steel Cup-Tip Set Screws

Made of alloy steel, these screws are strong enough to hold components without wearing down. The tip has thin edges that dig into surfaces for a secure hold. They often lock gears, pulleys, and other transmission components onto shafts.

	Specs. Met	Pkg. Qty.		Pkg.
Alloy Steel







	M36 × 4 mm

	40	19	Rockwell C45	DIN 916, ISO 4029	1	91390A585	000000

Sanitary Stainless Steel Truss Head Screws

Minimize bacteria and contaminants in food, pharmaceutical, and other sanitary environments. These screws are made of stainless steel, so they won't corrode from frequent washdowns with harsh cleaners and sanitizers. With an extremely smooth surface, they don't have microscopic crevices where bacteria can hide. Their wide head spreads out pressure without adding a washer and reduces the risk of crushing material, such as sheet metal. These screws have a wrench-flat drive with two shallow notches that self-drain to reduce bacterial growth. Tighten the drive with a spanner wrench.

Length is measured from under the head.

		Head, mm
	Lg., mm	Dia.	Ht.	Exterior Smoothness, Ra	Threading	Tensile Strength, psi		Each
Highly Corrosion-Resistant 316L Stainless Steel







				M12 × 1.75 mm

				25	27	7.5	32	Fully Threaded	70,000	97133A430	000000


				30	27	7.5	32	Fully Threaded	70,000	97133A440	00000

L-Key Sets


With Plastic Pouch	With Plastic Roll-Up Pouch

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.

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

	Finish	Container Type		Each
Alloy Steel







	Hex

	15	0.89, 1.27, 1.5, 2, 2.5, 3, 4, 5, 6, 8, 10, 12, 14, 17, 19	Long	Black Phosphate Coated	Plastic Roll-Up Pouch	6956A24	000000


	15	0.89, 1.27, 1.5, 2, 2.5, 3, 4, 5, 6, 8, 10, 12, 14, 17, 19	Long	Blue Painted	Plastic Pouch	5789A24	000000

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.

Extra Long—Reach deep fasteners with the extra-long leg on these L-keys. Flip them around and grip the long leg with two hands for extra leverage to loosen stubborn screws.

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







				Hex

				19	7 5/8"	Short	6 7/8"	2 11/16"	Black Phosphate Coated	DIN 911, ISO 2936	9542N77	000000	15	9542N451	0000000


				19	7 3/4"	Short	7"	2 3/4"	Blue Painted	—	5984A34	00000	—	———	0
				19	12 3/8"	Long	11 5/8"	2 11/16"	Black Phosphate Coated	DIN 911, ISO 2936	9542N86	00000	5	9542N459	00000
				19	12 1/2"	Long	11 3/4"	2 11/16"	Blue Painted	—	5984A54	00000	—	———	0
				19	17 3/4"	Extra Long	17"	2 11/16"	Black Oxide	—	7122A749	00000	5	7122A188	000000

Angled-Drive Ball-Tip L-Keys

Turn screws at an angle when you can’t access them head on. These L-keys have a ball tip on the long leg that engages the drive with less contact than a straight tip. Ball tips are handy for corners and tightly packed areas, such as control panels and junction boxes. However, they don’t grip as tightly as straight tips and may strip the drive of the fastener if you crank them too hard. These L-keys are precision manufactured to tight tolerances.

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

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

		Length				Ball
	Drive Size, mm	Overall	Relative	Long Leg	Short Leg	Location	Shape	Finish	Max. Access Angle		Each
Alloy Steel







				Hex

				19	12 1/2"	Long	11 3/4"	2 3/4"	Single Ball	Round	Black Phosphate Coated	25°	5503A56	000000