M2 Shoulder Bolts | McMaster-Carr

Filter by

System of Measurement

Shoulder Diameter

Shoulder Length

Thread Length

Socket Head Profile

Head Height

Material

Head Diameter

Fastener Head Type

Drive Style

Shoulder Fit

Thread Pitch

Head Texture

Thread Type

Drive Size

Finish

Relative Thread Length

Relative Thread Size

Performance

Minimum Shear Strength

RoHS

Export Control Classification Number (ECCN)

EAR99

REACH

Compliant

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Yes

DFARS Specialty Metals

144 Products

Performance

Precision

Twice as precise as standard-fit for smooth, accurate movement

41 products

Made-to-Order

Request the exact shoulder length you're looking for

4 products

Performance

High Strength

Withstand heavy loads and high stress without breaking

20 products

Wear Resistant

Withstand repeated friction without breaking down

20 products

Steel Hex-Drive Shoulder Screws

Our strongest standard-fit shoulder screws. With the highest tensile strength, they withstand stress and mechanical loads that would break other materials, such as aluminum, nickel, and stainless steel. However, they do sacrifice corrosion resistance.

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.

				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
Black-Oxide Alloy Steel







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

				3	M2 × 0.4 mm	3	5	2	1.5	140,000	—	—	—	94361A574	00000	00000


				3	M2 × 0.4 mm	4	5	2	1.5	140,000	ASTM A108	—	—	92981A767	0000	0000
				4	M2 × 0.4 mm	3	5	2	1.5	140,000	—	—	—	94361A575	0000	0000
				4	M2 × 0.4 mm	4	5	2	1.5	140,000	ASTM A108	—	—	92981A768	0000	0000
				6	M2 × 0.4 mm	3	5	2	1.5	140,000	—	—	—	94361A576	0000	0000
				6	M2 × 0.4 mm	4	5	2	1.5	140,000	ASTM A108	Material Certificate	Digital	92981A769	0000	0000
				8	M2 × 0.4 mm	3	5	2	1.5	140,000	—	—	—	94361A577	0000	0000
				8	M2 × 0.4 mm	4	5	2	1.5	140,000	ASTM A108	—	—	92981A770	0000	0000
				10	M2 × 0.4 mm	3	5	2	1.5	140,000	—	—	—	94361A578	0000	0000
				10	M2 × 0.4 mm	4	5	2	1.5	140,000	ASTM A108	—	—	92981A771	0000	0000
				12	M2 × 0.4 mm	3	5	2	1.5	140,000	—	—	—	94361A579	0000	0000


				12	M2 × 0.4 mm	4	5	2	1.5	140,000	ASTM A108	—	—	92981A772	0000	0000
				16	M2 × 0.4 mm	3	5	2	1.5	140,000	—	—	—	94361A581	0000	0000
				16	M2 × 0.4 mm	4	5	2	1.5	140,000	ASTM A108	—	—	92981A773	0000	0000
				20	M2 × 0.4 mm	3	5	2	1.5	140,000	—	—	—	94361A582	0000	0000
				20	M2 × 0.4 mm	4	5	2	1.5	140,000	ASTM A108	—	—	92981A774	0000	0000
				25	M2 × 0.4 mm	3	5	2	1.5	140,000	—	—	—	94361A583	0000	0000
				25	M2 × 0.4 mm	4	5	2	1.5	140,000	ASTM A108	Material Certificate	Digital	92981A775	0000	0000
				30	M2 × 0.4 mm	3	5	2	1.5	140,000	—	—	—	94361A584	0000	0000
				30	M2 × 0.4 mm	4	5	2	1.5	140,000	ASTM A108	—	—	92981A776	0000	0000

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.

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

Black-Oxide 18-8 Stainless Steel—Typically chosen for their appearance, these screws have a dark, matte coating to create a finished look. They won't rust in wet and outdoor environments, but they won't hold up to the harsh chemicals that 316 stainless steel can.

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.

				Head, mm				Certificate			Each
	Shoulder Lg., mm	Thread Size	Thread Lg., mm	Dia.	Ht.	Drive Size, mm	Tensile Strength, psi	Type	Form		1-4	5-Up
18-8 Stainless Steel







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

				3	M2 × 0.4 mm	4	5	2	2	70,000	Material Certificate	Digital	90265A100	00000	00000


				4	M2 × 0.4 mm	4	5	2	2	70,000	Material Certificate	Digital	90265A111	0000	0000
				5	M2 × 0.4 mm	4	5	2	2	70,000	Material Certificate	Digital	90265A112	0000	0000
				6	M2 × 0.4 mm	4	5	2	2	70,000	—	—	90265A113	0000	0000
				8	M2 × 0.4 mm	4	5	2	2	70,000	—	—	90265A114	0000	0000
				10	M2 × 0.4 mm	4	5	2	2	70,000	Material Certificate	Digital	90265A115	0000	0000
				20	M2 × 0.4 mm	4	5	2	2	70,000	—	—	90265A107	0000	0000
				25	M2 × 0.4 mm	4	5	2	2	70,000	—	—	90265A108	0000	0000
				30	M2 × 0.4 mm	4	5	2	2	70,000	—	—	90265A110	0000	0000
				40	M2 × 0.4 mm	4	5	2	2	70,000	—	—	90265A120	00000	00000
				50	M2 × 0.4 mm	4	5	2	2	70,000	—	—	90265A140	00000	00000




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

						4	M2 × 0.4 mm	5	6	3	2	70,000	—	—	90265A150	0000	0000


						5	M2 × 0.4 mm	5	6	3	2	70,000	—	—	90265A170	0000	0000
						6	M2 × 0.4 mm	5	6	3	2	70,000	—	—	90265A179	0000	0000
						10	M2 × 0.4 mm	5	6	3	2	70,000	—	—	90265A181	00000	00000


						Black-Oxide 18-8 Stainless Steel







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

										12	M2 × 0.4 mm	4	5	2	2	70,000	—	—	90265A529	0000	0000


										16	M2 × 0.4 mm	4	5	2	2	70,000	—	—	90265A531	0000	0000
										25	M2 × 0.4 mm	4	5	2	2	70,000	—	—	90265A534	00000	0000
										30	M2 × 0.4 mm	4	5	2	2	70,000	Material Certificate	Digital	90265A536	00000	00000
										40	M2 × 0.4 mm	4	5	2	2	70,000	Material Certificate	Digital	90265A537	00000	00000




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

												8	M2 × 0.4 mm	5	6	3	2	70,000	—	—	90265A547	00000	00000


												Highly Corrosion-Resistant 316 Stainless Steel







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

			3										M2 × 0.4 mm	4	5	2	2	70,000	—	—	90269A187	0000	0000


			4										M2 × 0.4 mm	4	5	2	2	70,000	—	—	90269A111	0000	0000
			5										M2 × 0.4 mm	4	5	2	2	70,000	—	—	90269A112	0000	0000
			6										M2 × 0.4 mm	4	5	2	2	70,000	—	—	90269A113	0000	0000
			7										M2 × 0.4 mm	4	5	2	2	70,000	Material Certificate	Digital	90269A188	0000	0000
			8										M2 × 0.4 mm	4	5	2	2	70,000	—	—	90269A114	0000	0000
			9										M2 × 0.4 mm	4	5	2	2	70,000	Material Certificate	Digital	90269A189	0000	0000
			10										M2 × 0.4 mm	4	5	2	2	70,000	—	—	90269A115	0000	0000
			12										M2 × 0.4 mm	4	5	2	2	70,000	—	—	90269A191	0000	0000
			14										M2 × 0.4 mm	4	5	2	2	70,000	—	—	90269A192	0000	0000
			15										M2 × 0.4 mm	4	5	2	2	70,000	—	—	90269A440	0000	0000


			16										M2 × 0.4 mm	4	5	2	2	70,000	—	—	90269A193	0000	0000
			18										M2 × 0.4 mm	4	5	2	2	70,000	—	—	90269A194	0000	0000
			20	M2 × 0.4 mm									4	5	2	2	70,000	Material Certificate	Digital	90269A195	00000	0000
			22	M2 × 0.4 mm	4								5	2	2	70,000	Material Certificate	Digital	90269A196	00000	0000
			25	M2 × 0.4 mm	4								5	2	2	70,000	—	—	90269A197	00000	00000
			30	M2 × 0.4 mm	4								5	2	2	70,000	—	—	90269A198	00000	00000
			35	M2 × 0.4 mm	4								5	2	2	70,000	—	—	90269A199	00000	00000
			40	M2 × 0.4 mm	4								5	2	2	70,000	—	—	90269A201	00000	00000
			45	M2 × 0.4 mm	4								5	2	2	70,000	—	—	90269A202	00000	00000
			50	M2 × 0.4 mm	4								5	2	2	70,000	—	—	90269A203	00000	00000




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

					4	M2 × 0.4 mm							5	6	3	2	70,000	—	—	90269A475	0000	0000


					5	M2 × 0.4 mm	5						6	3	2	70,000	Material Certificate	Digital	90269A479	0000	0000
					6	M2 × 0.4 mm	5						6	3	2	70,000	Material Certificate	Digital	90269A483	00000	0000
					8	M2 × 0.4 mm	5	6					3	2	70,000	Material Certificate	Digital	90269A487	00000	00000
					10	M2 × 0.4 mm	5	6	3				2	70,000	Material Certificate	Digital	90269A490	00000	00000


					Highly Corrosion-Resistant Black-Oxide 316 Stainless Steel







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

									3				M2 × 0.4 mm	4	5	2	2	70,000	Material Certificate	Digital	90269A428	0000	0000


									4	M2 × 0.4 mm	4		5	2	2	70,000	Material Certificate	Digital	90269A432	0000	0000
									5	M2 × 0.4 mm	4		5	2	2	70,000	Material Certificate	Digital	90269A435	0000	0000
									6	M2 × 0.4 mm	4		5	2	2	70,000	Material Certificate	Digital	90269A438	0000	0000
7									M2 × 0.4 mm	4	5		2	2	70,000	Material Certificate	Digital	90269A441	0000	0000
8									M2 × 0.4 mm	4	5		2	2	70,000	Material Certificate	Digital	90269A444	0000	0000
9									M2 × 0.4 mm	4	5		2	2	70,000	Material Certificate	Digital	90269A447	0000	0000
10									M2 × 0.4 mm	4	5	2	2	70,000	Material Certificate	Digital	90269A450	0000	0000
12	M2 × 0.4 mm								4	5	2	2	70,000	Material Certificate	Digital	90269A454	0000	0000
14	M2 × 0.4 mm	4							5	2	2	70,000	Material Certificate	Digital	90269A458	0000	0000
15	M2 × 0.4 mm	4							5	2	2	70,000	Material Certificate	Digital	90269A429	00000	0000


16	M2 × 0.4 mm	4							5	2	2	70,000	Material Certificate	Digital	90269A433	00000	0000
18	M2 × 0.4 mm	4							5	2	2	70,000	Material Certificate	Digital	90269A436	00000	0000
20	M2 × 0.4 mm	4							5	2	2	70,000	Material Certificate	Digital	90269A439	00000	00000
22	M2 × 0.4 mm	4							5	2	2	70,000	Material Certificate	Digital	90269A442	00000	00000
25	M2 × 0.4 mm	4							5	2	2	70,000	Material Certificate	Digital	90269A445	00000	00000
30	M2 × 0.4 mm	4							5	2	2	70,000	Material Certificate	Digital	90269A448	00000	00000
35	M2 × 0.4 mm	4							5	2	2	70,000	Material Certificate	Digital	90269A451	00000	00000
40	M2 × 0.4 mm	4							5	2	2	70,000	Material Certificate	Digital	90269A455	00000	00000
45	M2 × 0.4 mm	4							5	2	2	70,000	Material Certificate	Digital	90269A459	00000	00000
50	M2 × 0.4 mm	4							5	2	2	70,000	Material Certificate	Digital	90269A430	00000	00000




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

		4							M2 × 0.4 mm	5	6	3	2	70,000	Material Certificate	Digital	90269A463	00000	0000


		5							M2 × 0.4 mm	5	6	3	2	70,000	Material Certificate	Digital	90269A466	00000	00000
		6							M2 × 0.4 mm	5	6	3	2	70,000	Material Certificate	Digital	90269A469	00000	00000
		8							M2 × 0.4 mm	5	6	3	2	70,000	Material Certificate	Digital	90269A472	00000	00000
		10							M2 × 0.4 mm	5	6	3	2	70,000	Material Certificate	Digital	90269A476	00000	00000

Shoulder Shims

Shoulder

Shortening

Shoulder Shortening—Pare down the shoulder on screws or tighten the screw's hold. Stack multiple shims to get the exact spacing you need.

		Shoulder Shortening
	Thk.	For Screw Size	Pkg. Qty.		Pkg.
18-8 Stainless Steel







				For 4 mm Diameter Shoulder

				0.005"	M4	10	91437A401	000000


				0.01"	M4	10	91437A402	00000
				0.031"	M4	10	91437A403	00000


				Highly Corrosion-Resistant 316 Stainless Steel







								For 4 mm Diameter Shoulder

								0.005"	M4	10	96945A301	00000


								0.01"	M4	10	96945A302	00000
								0.031"	M4	10	96945A303	0000

Stainless Steel Low-Profile Hex-Drive Precision Shoulder Screws

Fit into tight spaces in corrosive environments. The head on these screws is about one-half to two-thirds the height of standard-profile screw heads, so they're not suited for high-strength fastening. They are engineered to tight tolerances for assemblies that require smooth and accurate movement, with shoulder diameters twice as precise as those on standard-fit screws.

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

				Head, mm				Certificate			Each
	Shoulder Lg., mm	Thread Size	Thread Lg., mm	Dia.	Ht.	Drive Size, mm	Tensile Strength, psi	Type	Form		1-4	5-Up
18-8 Stainless Steel







				3 mm Diameter Shoulder (-0.025 mm to 0 mm Tolerance)

				2	M2 × 0.4 mm	4	5	1.3	1.5	85,000	—	—	90323A601	00000	00000


				3	M2 × 0.4 mm	4	5	1.3	1.5	85,000	—	—	90323A602	0000	0000
				4	M2 × 0.4 mm	4	5	1.3	1.5	85,000	Material Certificate	Digital	90323A603	0000	0000
				5	M2 × 0.4 mm	4	5	1.3	1.5	85,000	—	—	90323A604	0000	0000
				6	M2 × 0.4 mm	4	5	1.3	1.5	85,000	Material Certificate	Digital	90323A605	0000	0000
				7	M2 × 0.4 mm	4	5	1.3	1.5	85,000	—	—	90323A606	0000	0000
				8	M2 × 0.4 mm	4	5	1.3	1.5	85,000	—	—	90323A607	0000	0000
				10	M2 × 0.4 mm	4	5	1.3	1.5	85,000	Material Certificate	Digital	90323A608	0000	0000
				12	M2 × 0.4 mm	4	5	1.3	1.5	85,000	—	—	90323A609	0000	0000
				14	M2 × 0.4 mm	4	5	1.3	1.5	85,000	Material Certificate	Digital	90323A611	0000	0000
				16	M2 × 0.4 mm	4	5	1.3	1.5	85,000	—	—	90323A612	0000	0000


				18	M2 × 0.4 mm	4	5	1.3	1.5	85,000	—	—	90323A613	0000	0000
				20	M2 × 0.4 mm	4	5	1.3	1.5	85,000	—	—	90323A614	0000	0000
				25	M2 × 0.4 mm	4	5	1.3	1.5	85,000	Material Certificate	Digital	90323A615	0000	0000

Stainless Steel Ultra-Low-Profile Hex-Drive Precision Shoulder Screws

Fit into the tightest spaces with screws that won't rust. The head on these screws is about one-third the height of standard-profile screw heads to prevent snags on nearby components. However, they're not suited for high-strength fastening. They are engineered to tight tolerances for assemblies that require smooth and accurate movement, with shoulder diameters twice as precise as those on standard-fit screws.

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

				Head, mm				Certificate			Each
	Shoulder Lg., mm	Thread Size	Thread Lg., mm	Dia.	Ht.	Drive Size, mm	Tensile Strength, psi	Type	Form		1-4	5-Up
18-8 Stainless Steel







				3 mm Diameter Shoulder (-0.03 mm to 0 mm Tolerance)

				2.5	M2 × 0.4 mm	4	5	0.7	1.5	95,000	—	—	90318A411	00000	00000


				3	M2 × 0.4 mm	4	5	0.7	1.5	95,000	—	—	90318A412	0000	0000
				4	M2 × 0.4 mm	4	5	0.7	1.5	95,000	Material Certificate	Digital	90318A413	0000	0000
				5	M2 × 0.4 mm	4	5	0.7	1.5	95,000	—	—	90318A414	0000	0000
				6	M2 × 0.4 mm	4	5	0.7	1.5	95,000	—	—	90318A415	0000	0000
				8	M2 × 0.4 mm	4	5	0.7	1.5	95,000	Material Certificate	Digital	90318A416	0000	0000

Stainless Steel Hex-Drive Precision Shoulder Screws

Our go-to choice for assemblies that require smooth, accurate movement. These screws are engineered for tight tolerances, with shoulder diameters twice as precise as those on standard-fit screws. They're made of stainless steel, so they won't rust, though they're not as strong as their alloy steel counterparts.

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

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.

				Head, mm				Certificate			Each
	Shoulder Lg., mm	Thread Size	Thread Lg., mm	Dia.	Ht.	Drive Size, mm	Tensile Strength, psi	Type	Form		1-4	5-Up
18-8 Stainless Steel







				3 mm Diameter Shoulder (-0.038 mm to -0.013 mm Tolerance)

				2	M2 × 0.4 mm	4	5	2	1.5	70,000	—	—	90278A431	00000	00000


				3	M2 × 0.4 mm	4	5	2	1.5	70,000	—	—	90278A432	0000	0000
				4	M2 × 0.4 mm	4	5	2	1.5	70,000	—	—	90278A433	0000	0000
				5	M2 × 0.4 mm	4	5	2	1.5	70,000	—	—	90278A434	0000	0000
				6	M2 × 0.4 mm	4	5	2	1.5	70,000	—	—	90278A435	0000	0000
				7	M2 × 0.4 mm	4	5	2	1.5	70,000	—	—	90278A436	0000	0000
				8	M2 × 0.4 mm	4	5	2	1.5	70,000	—	—	90278A437	0000	0000
				10	M2 × 0.4 mm	4	5	2	1.5	70,000	—	—	90278A438	0000	0000
				12	M2 × 0.4 mm	4	5	2	1.5	70,000	—	—	90278A439	0000	0000
				14	M2 × 0.4 mm	4	5	2	1.5	70,000	—	—	90278A440	0000	0000
				16	M2 × 0.4 mm	4	5	2	1.5	70,000	Material Certificate	Digital	90278A441	0000	0000


				18	M2 × 0.4 mm	4	5	2	1.5	70,000	—	—	90278A442	0000	0000
				20	M2 × 0.4 mm	4	5	2	1.5	70,000	—	—	90278A443	0000	0000
				25	M2 × 0.4 mm	4	5	2	1.5	70,000	—	—	90278A444	0000	0000


				Highly Corrosion-Resistant 316 Stainless Steel







								3 mm Diameter Shoulder (-0.025 mm to 0 mm Tolerance)

								2	M2 × 0.4 mm	4	5	2	1.5	70,000	—	—	90263A111	0000	0000


								3	M2 × 0.4 mm	4	5	2	1.5	70,000	—	—	90263A112	0000	0000
								4	M2 × 0.4 mm	4	5	2	1.5	70,000	—	—	90263A113	0000	0000
								5	M2 × 0.4 mm	4	5	2	1.5	70,000	—	—	90263A114	0000	0000
								6	M2 × 0.4 mm	4	5	2	1.5	70,000	Material Certificate	Digital	90263A115	0000	0000
								8	M2 × 0.4 mm	4	5	2	1.5	70,000	—	—	90263A116	00000	0000
								10	M2 × 0.4 mm	4	5	2	1.5	70,000	—	—	90263A117	00000	0000

Made-to-Order Stainless Steel Hex-Drive Shoulder Screws

Specify the exact shoulder length you need in screws that won't rust. These are ideal for replacing fasteners in older machines or for testing prototypes.

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

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

				Head, mm				Certificate			Each
	Choose a Shoulder Length, mm	Thread Size	Thread Lg., mm	Dia.	Ht.	Drive Size, mm	Tensile Strength, psi	Type	Form		1-4	5-9	10-Up
18-8 Stainless Steel







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

				4.00 to 49.75	M2 × 0.4 mm	4	5	2	2	70,000	Material Certificate	Digital	93856A112	000000	000000	00000


				50.00 to 99.75	M2 × 0.4 mm	4	5	2	2	70,000	Material Certificate	Digital	93856A122	00000	00000	0000




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

						4.00 to 49.75	M2 × 0.4 mm	5	6	3	2	70,000	Material Certificate	Digital	93856A141	00000	00000	0000


						50.00 to 99.75	M2 × 0.4 mm	5	6	3	2	70,000	Material Certificate	Digital	93856A151	00000	00000	00000