M27 Bolts | McMaster-Carr

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69 Products

Steel Hex Head Screws

Fully Threaded

Partially

Threaded

Our most popular hex head screws. These have a head with six flat sides to keep wrenches and sockets from slipping and rounding off the drive.

Length is measured from under the head.

Medium-Strength Fastener—Your go-to screws for fastening most machinery and equipment. They have tensile strengths from 90,000 to 120,000 psi.

High-Strength Fastener—Commonly used to fasten components in valves, pumps, motors, and other high-stress applications. These screws have a tensile strength of 125,000 to 160,000 psi.

Zinc-Yellow-Chromate-Plated Steel—With slightly better corrosion resistance than zinc-plated steel screws, these stand up to more frequent exposure to moisture.

		Head, mm
	Lg., mm	Wd.	Ht.	Threading	Thread Spacing	Fastener Strength Grade/Class	Tensile Strength, psi	Pkg. Qty.		Pkg.
Medium-Strength Steel







				M27 × 3 mm

				60	41	17	Fully Threaded	Coarse	Class 8.8	110,000	1	91280A961	00000


				80	41	17	Fully Threaded	Coarse	Class 8.8	110,000	1	91280A962	00000
				100	41	17	Fully Threaded	Coarse	Class 8.8	110,000	1	91280A963	00000


				High-Strength Zinc-Yellow-Chromate-Plated Steel







								M27 × 3 mm

								80	41	17	Fully Threaded	Coarse	Class 10.9	150,000	1	90854A328	00000


								90	41	17	Fully Threaded	Coarse	Class 10.9	150,000	1	90854A329	00000
								100	41	17	Partially Threaded	Coarse	Class 10.9	150,000	1	90854A341	00000
								120	41	17	Partially Threaded	Coarse	Class 10.9	150,000	1	90854A342	00000

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—Best for dry environments since moisture will cause these screws to rust. They have a dark, matte appearance.

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







				M27 × 3 mm

				60	40	27	Fully Threaded	Coarse	170,000	Class 12.9	1	91290A271	00000


				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

Steel Heavy Hex Head Structural Screws

Partially

Threaded

Secure structural joints, such as mating I-beams, columns, and joists. With a head that's about 10% wider than standard hex head screws, these handle heavier loads by distributing them over a larger area. The head also has six flat sides to keep wrenches and sockets from slipping and rounding off the drive.

Length is measured from under the head.

High-Strength Fastener—Commonly used to fasten components in valves, pumps, motors, and other high-stress applications. These screws have a tensile strength of 125,000 to 160,000 psi.

Hot-Dipped Galvanized Steel—The strength of steel with the rust resistance of stainless steel. These screws are an economical alternative to 18-8 stainless steel in wet and outdoor environments, but they won't hold up to salt water and chemicals. The galvanized finish is thicker than other types of coatings, so the threads may be more likely to stick during installation. You can only mate these screws with hot-dipped galvanized nuts.

Grip Length—Screws with a grip length have a precisely measured unthreaded section under the head, called a grip. It's stronger than the threaded section, so you can place it in joints exposed to sideways forces.

			Head, mm
	Lg., mm	Grip Lg., mm	Wd.	Ht.	Threading	Thread Spacing	Fastener Strength Grade/Class	Tensile Strength, psi		Each
High-Strength Hot-Dipped Galvanized Steel







				M27 × 3 mm

				70	29	46	17	Partially Threaded	Coarse	Class 10.9	150,000	97478A177	000000


				75	34	46	17	Partially Threaded	Coarse	Class 10.9	150,000	97478A178	00000
				80	39	46	17	Partially Threaded	Coarse	Class 10.9	150,000	97478A179	00000
				90	49	46	17	Partially Threaded	Coarse	Class 10.9	150,000	97478A181	00000
				100	59	46	17	Partially Threaded	Coarse	Class 10.9	150,000	97478A182	00000
				110	69	46	17	Partially Threaded	Coarse	Class 10.9	150,000	97478A183	00000
				120	79	46	17	Partially Threaded	Coarse	Class 10.9	150,000	97478A184	00000
				130	89	46	17	Partially Threaded	Coarse	Class 10.9	150,000	97478A185	00000
				140	99	46	17	Partially Threaded	Coarse	Class 10.9	150,000	97478A186	00000
				150	109	46	17	Partially Threaded	Coarse	Class 10.9	150,000	97478A187	00000
				160	119	46	17	Partially Threaded	Coarse	Class 10.9	150,000	97478A188	00000

Threaded Rods

Anchor, connect, or hang components in a wide variety of applications, from mounting I-beams to suspending light fixtures.

Medium-Strength Steel

Image of Product. Front orientation. Threaded Rods. Threaded Rods.

With tensile strengths from 110,000 psi to 125,000 psi, these rods are strong enough for most industrial applications, such as anchoring machinery and connecting pipe flanges. They are about twice as strong as low-strength steel rods. To avoid stripped threads during installation, make sure your nuts are also medium-strength steel.

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

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

	Hardness	Specs. Met		Each
Zinc-Plated Steel







	M27 × 3 mm

	1 m	110,000	Class 8.8	Rockwell C20	DIN 975	99067A275	0000000


	Steel







					M27 × 2 mm

					300 mm	125,000	ASTM Grade B7	Rockwell C35	ASTM A193, DIN 975	95245A205	00000


					1 m	125,000	ASTM Grade B7	Rockwell C35	ASTM A193, DIN 975	95245A206	000000




							M27 × 3 mm

							300 mm	125,000	ASTM Grade B7	Rockwell C35	ASTM A193, DIN 976	93325A449	00000


							1 m	125,000	ASTM Grade B7	Rockwell C35	ASTM A193, DIN 976	93325A451	000000
							1 m	110,000	Class 8.8	Rockwell C20	DIN 975	99055A155	000000
							2 m	125,000	ASTM Grade B7	Rockwell C35	ASTM A193, DIN 976	93325A452	000000

High-Strength Steel

With a tensile strength of 150,000 psi, these rods are strong enough to stabilize steel frameworks and structural supports, such as I-beams. They are about 25% stronger than medium-strength steel rods. To avoid stripped threads during installation, make sure your nuts are also high-strength steel.

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

	Hardness	Specs. Met		Each
Steel







	M27 × 3 mm

	1	150,000	Class 10.9	Rockwell C32	DIN 976	1078N22	0000000


	2	150,000	Class 10.9	Rockwell C32	DIN 976	1078N92	000000

Extreme-Strength Steel

Our strongest threaded rods have a tensile strength of 170,000 psi to hold up in your most demanding high-stress applications. They're about 20% stronger than high-strength steel rods. To avoid stripped threads during installation, make sure your nuts are also extreme-strength steel.

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

	Hardness	Specs. Met		Each
Steel







	M27 × 3 mm

	1	170,000	Class 12.9	Rockwell C39	DIN 976	1077N587	0000000


	2	170,000	Class 12.9	Rockwell C39	DIN 976	1077N595	000000

Low-Strength Steel

With a tensile strength of 50,000 psi or 60,000 psi, these rods are often used to suspend light fixtures, cable trays, and conduit from ceilings. They're about half the strength of medium-strength steel rods. To avoid stripped threads during installation, make sure your nuts are also low-strength steel.

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

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

	Specs. Met	Pkg. Qty.		Pkg.
Zinc-Plated Steel







	M27 × 3 mm

	300 mm	50,000	Rockwell B49	DIN 976	1	94595A247	000000


	1 m	50,000	Rockwell B49	DIN 976	1	94595A248	00000


	Steel







					M27 × 2 mm

					300 mm	50,000	Rockwell B49	DIN 976	1	98861A614	00000


					1 m	50,000	Rockwell B49	DIN 976	1	98861A615	00000




							M27 × 3 mm

							300 mm	50,000	Rockwell B49	DIN 976	1	98861A225	00000


							1 m	50,000	Rockwell B49	DIN 976	1	98861A571	00000

Stainless Steel

More corrosion resistant than steel rods and comparable in strength to low-strength steel.

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

	Specs. Met	Pkg. Qty.		Pkg.
18-8 Stainless Steel







	M27 × 3 mm

	300 mm	70,000	Not Rated	DIN 976	1	90024A311	000000


	1 m	70,000	Not Rated	DIN 976	1	90024A312	000000
	2 m	70,000	Not Rated	DIN 976	1	90024A313	000000

Stainless Steel Hex-Drive Shoulder Screws

These screws hold up against moisture and chemicals better than their steel counterparts, but they aren't as strong.

Check out our Made-to-Order Stainless Steel Hex-Drive Shoulder Screws if you don't see the shoulder length you need.

Highly Corrosion-Resistant 316 Stainless Steel—Superior to 18-8 stainless steel, these screws won't degrade when exposed to harsh weather, salt water, and most chemicals.

Highly Corrosion-Resistant Black-Oxide 316 Stainless Steel—Combines a finished appearance with the rust resistance of 316 stainless steel. Even if the coating wears off, these screws will hold up against corrosive agents in most environments, including salt water and most chemicals.

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

				Head, mm					Certificate			Each
	Shoulder Lg., mm	Thread Size	Thread Lg., mm	Dia.	Ht.	Drive Size, mm	Tensile Strength, psi	Specs. Met	Type	Form		1-4	5-Up
Highly Corrosion-Resistant 316 Stainless Steel







				30 mm Diameter Shoulder (-0.072 mm to -0.01 mm Tolerance)

				50	M27 × 3 mm	35	45	20	14	70,000	—	Material Certificate	Digital	90269A413	000000	000000


				60	M27 × 3 mm	35	45	20	14	70,000	—	Material Certificate	Digital	90269A414	00000	00000
				80	M27 × 3 mm	35	45	20	14	70,000	—	Material Certificate	Digital	90269A416	00000	00000
				100	M27 × 3 mm	35	45	20	14	70,000	—	Material Certificate	Digital	90269A418	00000	00000
				130	M27 × 3 mm	35	45	20	14	70,000	ISO 7379	Material Certificate	Digital	90269A944	000000	000000
				140	M27 × 3 mm	35	45	20	14	70,000	ISO 7379	Material Certificate	Digital	90269A937	000000	000000
				150	M27 × 3 mm	35	45	20	14	70,000	ISO 7379	Material Certificate	Digital	90269A934	000000	000000


				Highly Corrosion-Resistant Black-Oxide 316 Stainless Steel







								30 mm Diameter Shoulder (-0.072 mm to -0.01 mm Tolerance)

								50	M27 × 3 mm	35	45	20	14	70,000	ISO 7379	Material Certificate	Digital	90269A933	00000	00000


								60	M27 × 3 mm	35	45	20	14	70,000	ISO 7379	Material Certificate	Digital	90269A935	00000	00000
								70	M27 × 3 mm	35	45	20	14	70,000	ISO 7379	Material Certificate	Digital	90269A936	00000	00000
								80	M27 × 3 mm	35	45	20	14	70,000	ISO 7379	Material Certificate	Digital	90269A938	00000	00000
								90	M27 × 3 mm	35	45	20	14	70,000	ISO 7379	Material Certificate	Digital	90269A939	00000	00000
								100	M27 × 3 mm	35	45	20	14	70,000	ISO 7379	Material Certificate	Digital	90269A940	00000	00000
								120	M27 × 3 mm	35	45	20	14	70,000	ISO 7379	Material Certificate	Digital	90269A941	00000	00000
								130	M27 × 3 mm	35	45	20	14	70,000	ISO 7379	Material Certificate	Digital	90269A942	000000	000000
								140	M27 × 3 mm	35	45	20	14	70,000	ISO 7379	Material Certificate	Digital	90269A943	000000	000000
								150	M27 × 3 mm	35	45	20	14	70,000	ISO 7379	Material Certificate	Digital	90269A945	000000	000000

Threaded on Both Ends Setup Studs

Known as setup studs, these studs withstand sideways forces better than fully threaded studs because they have a strong unthreaded middle. The unthreaded middle also makes more contact with unthreaded holes, creating better alignment than a fully threaded stud.

Black-Oxide Steel

Black-oxide steel studs resist rusting in dry environments.

DIN 6379—Studs that meet DIN standards meet dimensional and material requirements.

	Thread, mm
	Lg. (A)	Lg. (B)	Lg., mm	Tensile Strength, psi	Specs. Met		Each
M27 × 3 mm



		56	39	125	100,000	DIN 6379	93275A730	000000


		122	39	200	100,000	DIN 6379	93275A765	00000

Eyebolts—For Lifting

Create a secure attachment point for hooks, shackles, and other lifting equipment. Also known as machinery eyebolts, these eyebolts are used to lift heavy machines and materials. They have a closed eye that won’t bend under strain.

Warning: Never use to lift people or items over people. Capacities listed are for vertical lifting only.

Steel

With

Shoulder

With Shoulder—Use for lifting at angles up to 45° or for vertical lifting. Because angular lifting significantly reduces the eyebolt’s capacity, we recommend hoist rings for heavy loads.

	Thread						With Shoulder
	Size	Lg., mm	Shank Lg., mm	Eye Dia., mm	Vert. Cap., lb.	Threading	Overall Lg., mm		Each
Closed Eye



		M27 × 3 mm	48	48	51	11,400	Fully Threaded	169	3040T22	000000

Galvanized Steel

With

Shoulder

Galvanized steel eyebolts have a hot-dipped finish for more corrosion resistance than zinc-plated steel.

With Shoulder—Use for lifting at angles up to 45° or for vertical lifting. Because angular lifting significantly reduces the eyebolt’s capacity, we recommend hoist rings for heavy loads.

	Thread						With Shoulder
	Size	Lg., mm	Shank Lg., mm	Eye Dia., mm	Vert. Cap., lb.	Threading	Overall Lg., mm		Each
Closed Eye



		M27 × 3 mm	70	70	51	11,400	Fully Threaded	191	4843T22	000000

T-Slot Nuts

Slide into T-slot tracks on machine tool tables to secure clamps and workpieces. These nuts are often paired with setup studs for adjustable fixtures.

Metric

Black-Oxide Steel—Create a finished look with a dark, matte coating. These nuts offer minimal corrosion resistance, so they're best for dry environments.

Fully Threaded—Fully threaded nuts allow a stud to extend beyond the bottom of the nut.

			Base, mm				Fully Threaded
	For Slot Wd., mm	Thread Size	Lg.	Wd.	Ht.	Overall Ht., mm		Each
Black-Oxide Steel



		32	M27 × 3 mm	50	50	20	40	90510A237	000000

Rotating Eyebolts—For Lifting

Unlike conventional eyebolts, you can rotate the eye 360° to match the angle of your load.

Note: Capacities listed are for vertical lifting only. Eyebolts with shoulder can be used for angular lifting up to 45°, but the capacities will be significantly reduced. For angular lifting, we recommend Hoist Rings.

Warning: Never use to lift people or items over people.

Powder-Coated Steel

Powder-coated steel eyebolts are impact resistant, but less corrosion resistant than stainless steel eyebolts. They include a removable key for tightening the bolt.

Closed Eye—Closed eyes are stronger than bent-closed eyes.

	Thread							With Shoulder
	Size	Lg., mm	Shank Lg., mm	Eye Dia., mm	Vert. Cap., lb.	Threading	Color	Overall Lg., mm		Each
Closed Eye



		M27 × 3 mm	36	36	49	7,050	Fully Threaded	Pink	126	3059T123	0000000