M27 Screws | McMaster-Carr

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REACH Compliant

	Head Diameter Head Diameter

40mm

45mm

	Minimum Thread Length Minimum Thread Length

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About Threaded Studs and Rods

About Shoulder Screws

About Hex Head Screws and Bolts

About Socket Head Screws

Fully Threaded

Partially Threaded

With a tensile strength of 170,000 psi, these alloy steel screws are stronger than Grade 8 steel screws. Length is measured from under the head.

Black-oxide steel screws are mildly corrosion resistant in dry environments.

Coarse threads are the industry standard; choose these screws if you don’t know the pitch or threads per inch. Screws that meet ASME B18.3, ASME B18.3M, ISO 21269, and ISO 4762 (formerly DIN 912) comply with specifications for dimensional standards.

For technical drawings and 3-D models, click on a part number.

				Head
Lg., mm	Threading	Min. Thread Lg., mm	Thread Spacing	Dia., mm	Ht., mm	Drive Size, mm	Tensile Strength, psi	Specifications Met	Pkg. Qty.		Pkg.
M27 × 3 mm
Black-Oxide Class 12.9 Alloy Steel
60	Fully Threaded	__	Coarse	40	27	19	170,000	DIN 912, ISO 4762	1	000000000	00000
70	Fully Threaded	__	Coarse	40	27	19	170,000	DIN 912, ISO 4762	1	000000000	0000
80	Fully Threaded	__	Coarse	40	27	19	170,000	DIN 912, ISO 4762	1	000000000	0000
100	Partially Threaded	66	Coarse	40	27	19	170,000	DIN 912, ISO 4762	1	000000000	00000
120	Partially Threaded	66	Coarse	40	27	19	170,000	DIN 912, ISO 4762	1	000000000	00000
140	Partially Threaded	66	Coarse	40	27	19	170,000	DIN 912, ISO 4762	1	000000000	00000
180	Partially Threaded	66	Coarse	40	27	19	170,000	DIN 912, ISO 4762	1	000000000	00000
200	Partially Threaded	66	Coarse	40	27	19	170,000	DIN 912, ISO 4762	1	000000000	00000

High-Strength Metric Class 10.9 Steel Hex Head Screws

Fully Threaded

Partially Threaded

Choose these Class 10.9 steel screws for high-stress applications, such as valves, pumps, motors, and automotive suspension systems. They are at least 25% stronger than medium-strength steel screws. Dimensions meet ISO (formerly DIN) or DIN specifications. Length is measured from under the head.

Zinc yellow-chromate plated and zinc-plated steel screws resist corrosion in wet environments. Match the thread spacing of mating components. Coarse threads are the industry standard; choose these screws if you don’t know the pitch.

For technical drawings and 3-D models, click on a part number.

				Head
Lg., mm	Threading	Min. Thread Lg., mm	Thread Spacing	Wd., mm	Ht., mm	Tensile Strength, psi	Specifications Met	Pkg. Qty.		Pkg.
Zinc Yellow-Chromate Plated Class 10.9 Steel
M27 × 3 mm
80	Fully Threaded	__	Coarse	41	17	150,000	ISO 4017, DIN 933	1	000000000	000000
90	Fully Threaded	__	Coarse	41	17	150,000	ISO 4017, DIN 933	1	000000000	00000
100	Partially Threaded	60	Coarse	41	17	150,000	ISO 4014, DIN 931	1	000000000	00000
120	Partially Threaded	60	Coarse	41	17	150,000	ISO 4014, DIN 931	1	000000000	00000

Medium-Strength Metric Class 8.8 Steel Hex Head Screws

Fully Threaded

These Class 8.8 steel screws are suitable for fastening most machinery and equipment. Dimensions meet ISO (formerly DIN) specifications. Length is measured from under the head.

Match the thread spacing of mating components. Coarse threads are the industry standard; choose these screws if you don’t know the pitch.

For technical drawings and 3-D models, click on a part number.

			Head
Lg., mm	Threading	Thread Spacing	Wd., mm	Ht., mm	Tensile Strength, psi	Specifications Met	Pkg. Qty.		Pkg.
Class 8.8 Steel
M27 × 3 mm
60	Fully Threaded	Coarse	41	17	110,000	ISO 4017, DIN 933	1	000000000	00000
80	Fully Threaded	Coarse	41	17	110,000	ISO 4017, DIN 933	1	000000000	0000
100	Fully Threaded	Coarse	41	17	110,000	ISO 4017, DIN 933	1	000000000	00000

Metric High-Strength Steel Heavy Hex Head Screws for Structural Applications

Designed for construction and exterior building applications, these metric screws are often used to join I-beams and scaffolding. Their partial threading leaves an unthreaded portion that is strong enough to stand up to the sideways forces of joints. Made of Class 10.9 steel, these screws are at least 25% stronger than our medium-strength steel heavy hex head screws. They also have a hot-dipped galvanized finish that makes them 10 times more corrosion resistant than zinc plating, so they won't rust in wet environments. However, this finish is thicker than other finishes, so they should be used with DIN 6916 structural washers and DIN 6915 structural hex nuts. All meet ISO 7412 (formerly DIN 6914), an international standard for screw dimensions.

					Head
Lg., mm	Threading	Thread Spacing	Thread Lg., mm	Grip Lg., mm	Wd., mm	Ht., mm	Tensile Strength, psi	Specifications Met		Each
Hot-Dipped Galvanized Class 10.9 Steel
M27 × 3 mm
70	Partially Threaded	Coarse	37	33	48	17	150,000	DIN 6914, ISO 7412	000000000	000000
75	Partially Threaded	Coarse	37	38	48	17	150,000	DIN 6914, ISO 7412	000000000	00000
80	Partially Threaded	Coarse	37	43	48	17	150,000	DIN 6914, ISO 7412	000000000	00000
90	Partially Threaded	Coarse	37	53	48	17	150,000	DIN 6914, ISO 7412	000000000	00000
100	Partially Threaded	Coarse	39	61	48	17	150,000	DIN 6914, ISO 7412	000000000	00000
110	Partially Threaded	Coarse	39	71	48	17	150,000	DIN 6914, ISO 7412	000000000	00000
120	Partially Threaded	Coarse	39	81	48	17	150,000	DIN 6914, ISO 7412	000000000	00000
130	Partially Threaded	Coarse	39	91	48	17	150,000	DIN 6914, ISO 7412	000000000	00000
140	Partially Threaded	Coarse	39	101	48	17	150,000	DIN 6914, ISO 7412	000000000	00000
150	Partially Threaded	Coarse	39	111	48	17	150,000	DIN 6914, ISO 7412	000000000	00000
160	Partially Threaded	Coarse	39	121	48	17	150,000	DIN 6914, ISO 7412	000000000	00000

Metric 18-8 Stainless Steel Shoulder Screws

Made from 18-8 stainless steel, these shoulder screws have good chemical resistance and may be mildly magnetic. A standard shoulder with an undersized tolerance allows them to fit most machinery and equipment. They’re often used to guide or align components, and as an axle or pivot point.

Black-oxide stainless steel screws have a head that has a matte-black finish.

For technical drawings and 3-D models, click on a part number.

Shoulder Screws

									Each
Shoulder Lg., mm	Thread Size	Thread Pitch, mm	Thread Lg., mm	Head Dia., mm	Head Ht., mm	Tensile Strength, psi	Drive Size, mm		1-4	5-Up
30 mm Shoulder Dia.—Standard Fit (-0.072 to -0.01 mm Dia. Tolerance)
50	M27	3	35	45	20	70,000	14	000000000	000000	000000
60	M27	3	35	45	20	70,000	14	000000000	00000	00000
70	M27	3	35	45	20	70,000	14	000000000	00000	00000
80	M27	3	35	45	20	70,000	14	000000000	00000	00000
90	M27	3	35	45	20	70,000	14	000000000	00000	00000
100	M27	3	35	45	20	70,000	14	000000000	00000	00000
120	M27	3	35	45	20	70,000	14	000000000	00000	00000
130	M27	3	35	45	20	70,000	14	000000000	000000	00000
140	M27	3	35	45	20	70,000	14	000000000	000000	000000
150	M27	3	35	45	20	70,000	14	000000000	000000	000000

Shoulder Screws with a Black-Oxide Finish

									Each
Shoulder Lg., mm	Thread Size	Thread Pitch, mm	Thread Lg., mm	Head Dia., mm	Head Ht., mm	Tensile Strength, psi	Drive Size, mm		1-4	5-Up
30 mm Shoulder Dia.—Standard Fit (-0.072 to -0.01 mm Dia. Tolerance)
50	M27	3	35	45	20	70,000	14	000000000	000000	000000
60	M27	3	35	45	20	70,000	14	000000000	00000	00000
70	M27	3	35	45	20	70,000	14	000000000	00000	00000
80	M27	3	35	45	20	70,000	14	000000000	00000	00000
90	M27	3	35	45	20	70,000	14	000000000	00000	00000
100	M27	3	35	45	20	70,000	14	000000000	00000	00000
120	M27	3	35	45	20	70,000	14	000000000	00000	00000
130	M27	3	35	45	20	70,000	14	000000000	000000	00000
140	M27	3	35	45	20	70,000	14	000000000	000000	000000
150	M27	3	35	45	20	70,000	14	000000000	000000	000000

Metric 316 Stainless Steel Shoulder Screws

More corrosion resistant than 18-8 stainless steel shoulder screws, these have excellent resistance to chemicals and salt water. They may be mildly magnetic. A standard shoulder with an undersized tolerance allows them to fit most machinery and equipment. They’re often used to guide or align components, and as an axle or pivot point.

Black-oxide stainless steel screws have a matte black finish.

For technical drawings and 3-D models, click on a part number.

Shoulder Screws

										Each
Shoulder Lg., mm	Thread Size	Thread Pitch, mm	Thread Lg., mm	Head Dia., mm	Head Ht., mm	Tensile Strength, psi	Drive Size, mm	Specifications Met		1-4	5-Up
30 mm Shoulder Dia.—Standard Fit (-0.072 to -0.01 mm Dia. Tolerance)
50	M27	3	35	45	20	70,000	14	__	000000000	000000	000000
60	M27	3	35	45	20	70,000	14	__	000000000	00000	00000
80	M27	3	35	45	20	70,000	14	__	000000000	00000	00000
100	M27	3	35	45	20	70,000	14	__	000000000	00000	00000
130	M27	3	35	45	20	70,000	14	ISO 7379	000000000	000000	00000
140	M27	3	35	45	20	70,000	14	ISO 7379	000000000	000000	000000
150	M27	3	35	45	20	70,000	14	ISO 7379	000000000	000000	000000

Shoulder Screws with a Black-Oxide Finish

										Each
Shoulder Lg., mm	Thread Size	Thread Pitch, mm	Thread Lg., mm	Head Dia., mm	Head Ht., mm	Tensile Strength, psi	Drive Size, mm	Specifications Met		1-4	5-Up
30 mm Shoulder Dia.—Standard Fit (-0.072 to -0.01 mm Dia. Tolerance)
50	M27	3	35	45	20	70,000	14	ISO 7379	000000000	000000	000000
60	M27	3	35	45	20	70,000	14	ISO 7379	000000000	00000	00000
70	M27	3	35	45	20	70,000	14	ISO 7379	000000000	00000	00000
80	M27	3	35	45	20	70,000	14	ISO 7379	000000000	00000	00000
90	M27	3	35	45	20	70,000	14	ISO 7379	000000000	00000	00000
100	M27	3	35	45	20	70,000	14	ISO 7379	000000000	00000	00000
120	M27	3	35	45	20	70,000	14	ISO 7379	000000000	00000	00000
130	M27	3	35	45	20	70,000	14	ISO 7379	000000000	000000	00000
140	M27	3	35	45	20	70,000	14	ISO 7379	000000000	000000	000000
150	M27	3	35	45	20	70,000	14	ISO 7379	000000000	000000	000000

Metric Medium-Strength Steel Threaded Rods—Grade B7

These Grade B7 threaded rods meet the pressure and temperature requirements of ASTM A193 and are often used to secure pressure tanks, valves, and flanges.

For technical drawings and 3-D models, click on a part number.

Steel
Lg.	Thread Pitch, mm	Tensile Strength, psi	Hardness	Specifications Met		Each
M27
300 mm	3	125,000	Rockwell C35	ASTM A193, DIN 976	000000000	000000
1 m	3	125,000	Rockwell C35	ASTM A193, DIN 976	000000000	000000
2 m	3	125,000	Rockwell C35	ASTM A193, DIN 976	000000000	000000

Medium-Strength Steel Threaded Rods—Class 8.8

An economical alternative to Grade B7 and Grade B16 threaded rods, these metric Class 8.8 rods are suitable for fastening most machinery and equipment.

Zinc-plated steel threaded rods resist corrosion in wet environments.

For technical drawings and 3-D models, click on a part number.

Steel
Lg.	Thread Pitch, mm	Tensile Strength, psi	Hardness	Specifications Met		Each
M27
1 m	3	110,000	Rockwell C20	DIN 975	000000000	000000
Zinc-Plated Steel
M27
1 m	3	110,000	Rockwell C20	DIN 975	000000000	000000

Metric Fine-Thread Low-Strength Steel Threaded Rods

About half the strength of medium-strength steel threaded rods, use these for light duty hanging, mounting, and fastening.

For technical drawings and 3-D models, click on a part number.

Steel
Lg.	Thread Pitch, mm	Tensile Strength, psi	Hardness	Specifications Met		Each
M27
300 mm	2	50,000	Rockwell B49	DIN 976	000000000	000000
1 m	2	50,000	Rockwell B49	DIN 976	000000000	00000

Metric Low-Strength Steel Threaded Rods

These threaded rods are about half the strength of medium-strength steel threaded rods for light duty hanging, mounting, and fastening.

Zinc-plated steel threaded rods are corrosion resistant in wet environments.

For technical drawings and 3-D models, click on a part number.

Steel
Lg.	Thread Pitch, mm	Tensile Strength, psi	Hardness	Specifications Met	Pkg. Qty.		Pkg.
M27
300 mm	3	50,000	Rockwell B49	DIN 976	1	000000000	000000
1 m	3	50,000	Rockwell B49	DIN 976	1	000000000	00000
Zinc-Plated Steel
M27
300 mm	3	50,000	Rockwell B49	DIN 976	1	000000000	000000
1 m	3	50,000	Rockwell B49	DIN 976	1	000000000	000000

Metric High-Strength Steel Threaded Rods—Class 10.9

These Class 10.9 steel threaded rods are about 25% stronger than medium-strength steel rods.

For technical drawings and 3-D models, click on a part number.

Steel
Lg.	Thread Pitch, mm	Tensile Strength, psi	Hardness	Specifications Met		Each
M27
1 m	3	150,000	Rockwell C32	DIN 976	0000000	0000000
2 m	3	150,000	Rockwell C32	DIN 976	0000000	000000

Metric Very-High-Strength Steel Threaded Rods—Class 12.9

Class 12.9 rods are about 20% stronger than Class 10.9 threaded rods and are for use in heavy machinery.

For technical drawings and 3-D models, click on a part number.

Steel
Lg.	Thread Pitch, mm	Tensile Strength, psi	Hardness	Specifications Met		Each
M27
1 m	3	170,000	Rockwell C39	DIN 976	00000000	0000000
2 m	3	170,000	Rockwell C39	DIN 976	00000000	000000

Metric 18-8 Stainless Steel Threaded Rods

These 18-8 stainless steel threaded rods have good chemical resistance and may be mildly magnetic.

For technical drawings and 3-D models, click on a part number.

18-8 Stainless Steel
Lg.	Thread Pitch, mm	Tensile Strength, psi	Hardness	Specifications Met	Pkg. Qty.		Pkg.
M27
300 mm	3	70,000	Not Rated	DIN 976	1	000000000	0000000
1 m	3	70,000	Not Rated	DIN 976	1	000000000	000000
2 m	3	70,000	Not Rated	DIN 976	1	000000000	000000

Setup Studs

Black-Oxide Steel

Secure setup clamps and fixtures to your machine table, or assemble heavy machines, such as engine mounts. These studs act as a pilot when connecting parts since they’re headless, which eases installation. Unlike a bolt, which has a head, they let you access parts from either end, but they require nuts to hold the part. Pair them with a T-slot or flanged nut when securing to a machine table. Or, put a nut on before your part to work as a float, allowing you to adjust the height of your part. The unthreaded middle is useful for gripping and adjusting. Also known as double-ended studs.

Steel studs are stronger than stainless steel studs. Black-oxide steel studs resist rusting in dry environments.

DIN studs meet dimensional and material requirements.

For technical drawings and 3-D models, click on a part number.

Metric—Black-Oxide Steel

Thread
Lg. (A), mm	Lg. (B), mm	Lg., mm	Min. Tensile Strength, psi	Specifications Met		Each
M27 × 3mm
56	39	125	100,000	DIN 6379	000000000	000000
122	39	200	100,000	DIN 6379	000000000	00000
200	39	315	100,000	DIN 6379	000000000	00000

Eyebolts—For Lifting

With Shoulder

Also known as machinery eyebolts.

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

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.

For technical drawings and 3-D models, click on a part number.

Metric Thread

Thread							With Shoulder
Size	Pitch, mm	Lg., mm	Shank Lg., mm	Overall Lg., mm	Eye Dia., mm	Vertical Capacity, lbs.		Each
Steel
M27	3	48	48	169	51	11,450	0000000	000000
Galvanized Steel
M27	3	70	70	191	51	11,450	0000000	00000

Rotating Eyebolts—For Lifting

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

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

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

For technical drawings and 3-D models, click on a part number.

Metric Thread

Thread								With Shoulder
Size	Pitch, mm	Lg., mm	Shank Lg., mm	Overall Lg., mm	Eye Dia., mm	Vertical Capacity, lbs.	Color		Each
Powder-Coated Steel
M27	3	36	36	126	49	17,600	Pink	00000000	0000000

About Threaded Studs and Rods

About Shoulder Screws

About Hex Head Screws and Bolts

About Socket Head Screws

Alloy Steel Socket Head Screws

High-Strength Metric Class 10.9 Steel Hex Head Screws

Medium-Strength Metric Class 8.8 Steel Hex Head Screws

Metric High-Strength Steel Heavy Hex Head Screws for Structural Applications

Metric 18-8 Stainless Steel Shoulder Screws

Metric 316 Stainless Steel Shoulder Screws

Metric Medium-Strength Steel Threaded Rods—Grade B7

Medium-Strength Steel Threaded Rods—Class 8.8

Metric Fine-Thread Low-Strength Steel Threaded Rods

Metric Low-Strength Steel Threaded Rods

Metric High-Strength Steel Threaded Rods—Class 10.9

Metric Very-High-Strength Steel Threaded Rods—Class 12.9

Metric 18-8 Stainless Steel Threaded Rods

Setup Studs

Eyebolts—For Lifting

Rotating Eyebolts—For Lifting