M2 Shoulder Bolts | McMaster-Carr

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138 Products

About Shoulder Screws

Comparable to Class 12.9 steel, these alloy steel shoulder screws are the strongest we offer. They have a standard shoulder with an undersized tolerance to fit most machinery and equipment. Also known as stripper bolts, they're commonly used in punch and die assemblies, and as an axle or pivot point.

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

											Each
Shoulder Lg., mm	Thread Size	Thread Pitch, mm	Thread Lg., mm	Head Dia., mm	Head Ht., mm	Finish	Tensile Strength, psi	Drive Size, mm	Specifications Met		1-4	5-Up
3 mm Shoulder Dia.—Standard Fit (-0.072 to -0.01 mm Dia. Tolerance)
3	M2	0.4	4	5	2	Black Oxide	140,000	1.5	ASTM A108	000000000	00000	00000
4	M2	0.4	4	5	2	Black Oxide	140,000	1.5	ASTM A108	000000000	0000	0000
6	M2	0.4	4	5	2	Black Oxide	140,000	1.5	ASTM A108	000000000	0000	0000
8	M2	0.4	4	5	2	Black Oxide	140,000	1.5	ASTM A108	000000000	0000	0000
10	M2	0.4	4	5	2	Black Oxide	140,000	1.5	ASTM A108	000000000	0000	0000
12	M2	0.4	4	5	2	Black Oxide	140,000	1.5	ASTM A108	000000000	0000	0000
16	M2	0.4	4	5	2	Black Oxide	140,000	1.5	ASTM A108	000000000	0000	0000
20	M2	0.4	4	5	2	Black Oxide	140,000	1.5	ASTM A108	000000000	0000	0000
25	M2	0.4	4	5	2	Black Oxide	140,000	1.5	ASTM A108	000000000	0000	0000
30	M2	0.4	4	5	2	Black Oxide	140,000	1.5	ASTM A108	000000000	0000	0000

Short-Thread Alloy Steel Shoulder Screws

Use these screws in thin materials; they have a shorter threaded portion than our standard shoulder screws. They’re comparable in strength to Grade 8 steel. A standard shoulder with an undersized tolerance allows them to fit most machinery and equipment. Also known as stripper bolts, they're commonly used in punch and die assemblies, and as an axle or pivot point.

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

Metric

										Each
Shoulder Lg., mm	Thread Size	Thread Pitch, mm	Thread Lg., mm	Head Dia., mm	Head Ht., mm	Finish	Tensile Strength, psi	Drive Size, mm		1-4	5-Up
3 mm Shoulder Dia.—Standard Fit (-0.072 to -0.01 mm Dia. Tolerance)
3	M2	0.4	3	5	2	Black Oxide	140,000	1.5	000000000	00000	00000
4	M2	0.4	3	5	2	Black Oxide	140,000	1.5	000000000	0000	0000
6	M2	0.4	3	5	2	Black Oxide	140,000	1.5	000000000	0000	0000
8	M2	0.4	3	5	2	Black Oxide	140,000	1.5	000000000	0000	0000
10	M2	0.4	3	5	2	Black Oxide	140,000	1.5	000000000	0000	0000
12	M2	0.4	3	5	2	Black Oxide	140,000	1.5	000000000	0000	0000
16	M2	0.4	3	5	2	Black Oxide	140,000	1.5	000000000	0000	0000
20	M2	0.4	3	5	2	Black Oxide	140,000	1.5	000000000	0000	0000
25	M2	0.4	3	5	2	Black Oxide	140,000	1.5	000000000	0000	0000
30	M2	0.4	3	5	2	Black Oxide	140,000	1.5	000000000	0000	0000

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
3 mm Shoulder Dia.—Standard Fit (-0.072 to -0.01 mm Dia. Tolerance)
3	M2	0.4	4	5	2	70,000	2	000000000	00000	00000
4	M2	0.4	4	5	2	70,000	2	000000000	0000	0000
5	M2	0.4	4	5	2	70,000	2	000000000	0000	0000
6	M2	0.4	4	5	2	70,000	2	000000000	0000	0000
8	M2	0.4	4	5	2	70,000	2	000000000	0000	0000
10	M2	0.4	4	5	2	70,000	2	000000000	0000	0000
20	M2	0.4	4	5	2	70,000	2	000000000	0000	0000
25	M2	0.4	4	5	2	70,000	2	000000000	0000	0000
30	M2	0.4	4	5	2	70,000	2	000000000	0000	0000
40	M2	0.4	4	5	2	70,000	2	000000000	00000	00000
50	M2	0.4	4	5	2	70,000	2	000000000	00000	00000
4 mm Shoulder Dia.—Standard Fit (-0.072 to -0.01 mm Dia. Tolerance)
4	M2	0.4	5	6	3	70,000	2	000000000	0000	0000
5	M2	0.4	5	6	3	70,000	2	000000000	0000	0000
6	M2	0.4	5	6	3	70,000	2	000000000	0000	0000
10	M2	0.4	5	6	3	70,000	2	000000000	00000	00000

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
3 mm Shoulder Dia.—Standard Fit (-0.072 to -0.01 mm Dia. Tolerance)
12	M2	0.4	4	5	2	70,000	2	000000000	00000	00000
16	M2	0.4	4	5	2	70,000	2	000000000	0000	0000
25	M2	0.4	4	5	2	70,000	2	000000000	00000	0000
30	M2	0.4	4	5	2	70,000	2	000000000	00000	00000
40	M2	0.4	4	5	2	70,000	2	000000000	00000	00000
4 mm Shoulder Dia.—Standard Fit (-0.072 to -0.01 mm Dia. Tolerance)
8	M2	0.4	5	6	3	70,000	2	000000000	00000	00000

Made-to-Order Shoulder Screws

For made-to-order shoulder screws, please specify the shoulder length in 0.25 mm increments.

									Each
Thread Size	Thread Pitch, mm	Thread Lg., mm	Head Dia., mm	Head Ht., mm	Tensile Strength, psi	Drive Size, mm	Choose a Shoulder Lg., mm		1-4	5-9	10-Up
3 mm Shoulder Dia.—Standard Fit (-0.072 to -0.01 mm Dia. Tolerance)
M2	0.4	4	5	2	70,000	2	4-49.75	000000000	000000	000000	00000
M2	0.4	4	5	2	70,000	2	50-99.75	000000000	00000	00000	0000
4 mm Shoulder Dia.—Standard Fit (-0.072 to -0.01 mm Dia. Tolerance)
M2	0.4	5	6	3	70,000	2	4-49.75	000000000	00000	00000	0000
M2	0.4	5	6	3	70,000	2	50-99.75	000000000	00000	00000	00000

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.

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
3 mm Shoulder Dia.—Standard Fit (-0.072 to -0.01 mm Dia. Tolerance)
3	M2	0.4	4	5	2	70,000	2	000000000	00000	00000
4	M2	0.4	4	5	2	70,000	2	000000000	0000	0000
5	M2	0.4	4	5	2	70,000	2	000000000	0000	0000
6	M2	0.4	4	5	2	70,000	2	000000000	0000	0000
7	M2	0.4	4	5	2	70,000	2	000000000	0000	0000
8	M2	0.4	4	5	2	70,000	2	000000000	0000	0000
9	M2	0.4	4	5	2	70,000	2	000000000	0000	0000
10	M2	0.4	4	5	2	70,000	2	000000000	0000	0000
12	M2	0.4	4	5	2	70,000	2	000000000	0000	0000
14	M2	0.4	4	5	2	70,000	2	000000000	0000	0000
15	M2	0.4	4	5	2	70,000	2	000000000	0000	0000
16	M2	0.4	4	5	2	70,000	2	000000000	0000	0000
18	M2	0.4	4	5	2	70,000	2	000000000	0000	0000
20	M2	0.4	4	5	2	70,000	2	000000000	00000	0000
22	M2	0.4	4	5	2	70,000	2	000000000	00000	0000
25	M2	0.4	4	5	2	70,000	2	000000000	00000	00000
30	M2	0.4	4	5	2	70,000	2	000000000	00000	00000
35	M2	0.4	4	5	2	70,000	2	000000000	00000	00000
40	M2	0.4	4	5	2	70,000	2	000000000	00000	00000
45	M2	0.4	4	5	2	70,000	2	000000000	00000	00000
50	M2	0.4	4	5	2	70,000	2	000000000	00000	00000
4 mm Shoulder Dia.—Standard Fit (-0.072 to -0.01 mm Dia. Tolerance)
4	M2	0.4	5	6	3	70,000	2	000000000	0000	0000
5	M2	0.4	5	6	3	70,000	2	000000000	0000	0000
6	M2	0.4	5	6	3	70,000	2	000000000	00000	0000
8	M2	0.4	5	6	3	70,000	2	000000000	00000	00000
10	M2	0.4	5	6	3	70,000	2	000000000	00000	00000

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
3 mm Shoulder Dia.—Standard Fit (-0.072 to -0.01 mm Dia. Tolerance)
3	M2	0.4	4	5	2	70,000	2	000000000	00000	00000
4	M2	0.4	4	5	2	70,000	2	000000000	0000	0000
5	M2	0.4	4	5	2	70,000	2	000000000	0000	0000
6	M2	0.4	4	5	2	70,000	2	000000000	0000	0000
7	M2	0.4	4	5	2	70,000	2	000000000	0000	0000
8	M2	0.4	4	5	2	70,000	2	000000000	0000	0000
9	M2	0.4	4	5	2	70,000	2	000000000	0000	0000
10	M2	0.4	4	5	2	70,000	2	000000000	0000	0000
12	M2	0.4	4	5	2	70,000	2	000000000	0000	0000
14	M2	0.4	4	5	2	70,000	2	000000000	0000	0000
15	M2	0.4	4	5	2	70,000	2	000000000	00000	0000
16	M2	0.4	4	5	2	70,000	2	000000000	00000	0000
18	M2	0.4	4	5	2	70,000	2	000000000	00000	0000
20	M2	0.4	4	5	2	70,000	2	000000000	00000	00000
22	M2	0.4	4	5	2	70,000	2	000000000	00000	00000
25	M2	0.4	4	5	2	70,000	2	000000000	00000	00000
30	M2	0.4	4	5	2	70,000	2	000000000	00000	00000
35	M2	0.4	4	5	2	70,000	2	000000000	00000	00000
40	M2	0.4	4	5	2	70,000	2	000000000	00000	00000
45	M2	0.4	4	5	2	70,000	2	000000000	00000	00000
50	M2	0.4	4	5	2	70,000	2	000000000	00000	00000
4 mm Shoulder Dia.—Standard Fit (-0.072 to -0.01 mm Dia. Tolerance)
4	M2	0.4	5	6	3	70,000	2	000000000	00000	0000
5	M2	0.4	5	6	3	70,000	2	000000000	00000	00000
6	M2	0.4	5	6	3	70,000	2	000000000	00000	00000
8	M2	0.4	5	6	3	70,000	2	000000000	00000	00000
10	M2	0.4	5	6	3	70,000	2	000000000	00000	00000

Metric 18-8 Stainless Steel Precision Shoulder Screws

Made of 18-8 stainless steel, these shoulder screws have good corrosion resistance and may be mildly magnetic. With a shoulder diameter that is twice as precise as our general purpose shoulder screws, they provide smooth, accurate movement. Use them where precision matters, such as in measuring devices, optical fixtures, and laboratory equipment.

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

18-8 Stainless Steel

									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
3 mm Shoulder Dia.—Precise Fit (-0.038 to -0.013 mm Dia. Tolerance)
2	M2	0.4	4	5	2	70,000	1.5	000000000	00000	00000
3	M2	0.4	4	5	2	70,000	1.5	000000000	0000	0000
4	M2	0.4	4	5	2	70,000	1.5	000000000	0000	0000
5	M2	0.4	4	5	2	70,000	1.5	000000000	0000	0000
6	M2	0.4	4	5	2	70,000	1.5	000000000	0000	0000
7	M2	0.4	4	5	2	70,000	1.5	000000000	0000	0000
8	M2	0.4	4	5	2	70,000	1.5	000000000	0000	0000
10	M2	0.4	4	5	2	70,000	1.5	000000000	0000	0000
12	M2	0.4	4	5	2	70,000	1.5	000000000	0000	0000
14	M2	0.4	4	5	2	70,000	1.5	000000000	0000	0000
16	M2	0.4	4	5	2	70,000	1.5	000000000	0000	0000
18	M2	0.4	4	5	2	70,000	1.5	000000000	0000	0000
20	M2	0.4	4	5	2	70,000	1.5	000000000	0000	0000
25	M2	0.4	4	5	2	70,000	1.5	000000000	0000	0000

Metric 316 Stainless Steel Precision 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. All are passivated for added protection against oxidation and corrosion. With a shoulder diameter that is twice as precise as our general purpose shoulder screws, these screws provide smooth, accurate movement. Use them where precision matters, such as in measuring devices, optical fixtures, and laboratory equipment.

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

									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
3 mm Shoulder Dia.—Precise Fit (-0.025 to 0 mm Dia. Tolerance)
2	M2	0.4	4	5	2	70,000	1.5	000000000	00000	00000
3	M2	0.4	4	5	2	70,000	1.5	000000000	0000	0000
4	M2	0.4	4	5	2	70,000	1.5	000000000	0000	0000
5	M2	0.4	4	5	2	70,000	1.5	000000000	0000	0000
6	M2	0.4	4	5	2	70,000	1.5	000000000	0000	0000
8	M2	0.4	4	5	2	70,000	1.5	000000000	00000	0000
10	M2	0.4	4	5	2	70,000	1.5	000000000	00000	0000

Metric Low-Profile Precision Shoulder Screws

The head height of these screws is about two-thirds the head height of a standard shoulder screw. Use them in low-clearance applications such as inside machines. Made of 18-8 stainless steel, they have good corrosion resistance and may be mildly magnetic. All are passivated for added protection against oxidation and corrosion. With a shoulder diameter that is twice as precise as our general purpose shoulder screws, they provide smooth, accurate movement. Use them where precision matters, such as in measuring devices, optical fixtures, and laboratory equipment.

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

										Each
Shoulder Lg., mm	Thread Size	Thread Pitch, mm	Thread Lg., mm	Head Dia., mm	Head Ht., mm	Material	Tensile Strength, psi	Drive Size, mm		1-4	5-Up
3 mm Shoulder Dia.—Precise Fit (-0.025 to 0 mm Dia. Tolerance)
2	M2	0.4	4	5	1.3	18-8 Stainless Steel	85,000	1.5	000000000	00000	00000
3	M2	0.4	4	5	1.3	18-8 Stainless Steel	85,000	1.5	000000000	0000	0000
4	M2	0.4	4	5	1.3	18-8 Stainless Steel	85,000	1.5	000000000	0000	0000
5	M2	0.4	4	5	1.3	18-8 Stainless Steel	85,000	1.5	000000000	0000	0000
6	M2	0.4	4	5	1.3	18-8 Stainless Steel	85,000	1.5	000000000	0000	0000
7	M2	0.4	4	5	1.3	18-8 Stainless Steel	85,000	1.5	000000000	0000	0000
8	M2	0.4	4	5	1.3	18-8 Stainless Steel	85,000	1.5	000000000	0000	0000
10	M2	0.4	4	5	1.3	18-8 Stainless Steel	85,000	1.5	000000000	0000	0000
12	M2	0.4	4	5	1.3	18-8 Stainless Steel	85,000	1.5	000000000	0000	0000
14	M2	0.4	4	5	1.3	18-8 Stainless Steel	85,000	1.5	000000000	0000	0000
16	M2	0.4	4	5	1.3	18-8 Stainless Steel	85,000	1.5	000000000	0000	0000
18	M2	0.4	4	5	1.3	18-8 Stainless Steel	85,000	1.5	000000000	0000	0000
20	M2	0.4	4	5	1.3	18-8 Stainless Steel	85,000	1.5	000000000	0000	0000
25	M2	0.4	4	5	1.3	18-8 Stainless Steel	85,000	1.5	000000000	0000	0000

Ultra-Low-Profile Precision Shoulder Screws

These screws have a head height about one-third the head height of a standard shoulder screw. Use them in low-clearance applications such as inside machines. Made of stainless steel, they have good corrosion resistance and may be mildly magnetic. With a shoulder diameter that is twice as precise as our general purpose shoulder screws, they provide smooth, accurate movement. Use them where precision matters, such as in measuring devices, optical fixtures, and laboratory equipment.

Passivated stainless steel screws have added protection against oxidation and corrosion.

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

Metric

											Each
Shoulder Lg., mm	Thread Size	Thread Pitch, mm	Thread Lg., mm	Head Dia., mm	Head Ht., mm	Material	Finish	Tensile Strength, psi	Drive Size, mm		1-4	5-Up
3 mm Shoulder Dia.—Precise Fit (-0.03 to 0 mm Dia. Tolerance)
2.5	M2	0.4	4	5	0.7	18-8 Stainless Steel	Passivated	95,000	1.5	000000000	00000	00000
3	M2	0.4	4	5	0.7	18-8 Stainless Steel	Passivated	95,000	1.5	000000000	0000	0000
4	M2	0.4	4	5	0.7	18-8 Stainless Steel	Passivated	95,000	1.5	000000000	0000	0000
5	M2	0.4	4	5	0.7	18-8 Stainless Steel	Passivated	95,000	1.5	000000000	0000	0000
6	M2	0.4	4	5	0.7	18-8 Stainless Steel	Passivated	95,000	1.5	000000000	0000	0000
8	M2	0.4	4	5	0.7	18-8 Stainless Steel	Passivated	95,000	1.5	000000000	0000	0000

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About Shoulder Screws

Metric Alloy Steel Shoulder Screws

Short-Thread Alloy Steel Shoulder Screws

Metric 18-8 Stainless Steel Shoulder Screws

Metric 316 Stainless Steel Shoulder Screws

Metric 18-8 Stainless Steel Precision Shoulder Screws

Metric 316 Stainless Steel Precision Shoulder Screws

Metric Low-Profile Precision Shoulder Screws

Ultra-Low-Profile Precision Shoulder Screws