5/16"-24 Shoulder Bolts | McMaster-Carr

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Thread Direction

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Drive Size

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Tensile Strength

60,000 psi to 80,999 psi

100,000 psi or greater

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

Yes

RoHS

Compliant

Compliant with Exemptions

Export Control Classification Number (ECCN)

EAR99

REACH

Compliant

DFARS Specialty Metals

87 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						Each
	Shoulder Lg.	Thread Size	Thread Lg.	Dia.	Ht.	Drive Size	Tensile Strength, psi	Material Certificate Form		1-4	5-Up
Black-Oxide Alloy Steel







				3/8" Diameter Shoulder (-0.004" to -0.002" Tolerance)

				1/4"	5/16"-24	3/16"	9/16"	1/4"	3/16"	140,000	—	94361A131	00000	00000


				5/16"	5/16"-24	3/16"	9/16"	1/4"	3/16"	140,000	—	94361A337	0000	0000
				3/8"	5/16"-24	3/16"	9/16"	1/4"	3/16"	140,000	—	94361A132	0000	0000
				7/16"	5/16"-24	3/16"	9/16"	1/4"	3/16"	140,000	—	94361A338	0000	0000
				1/2"	5/16"-24	3/16"	9/16"	1/4"	3/16"	140,000	—	94361A133	0000	0000
				9/16"	5/16"-24	3/16"	9/16"	1/4"	3/16"	140,000	—	94361A339	0000	0000
				5/8"	5/16"-24	3/16"	9/16"	1/4"	3/16"	140,000	—	94361A134	0000	0000
				11/16"	5/16"-24	3/16"	9/16"	1/4"	3/16"	140,000	—	94361A341	0000	0000
				3/4"	5/16"-24	3/16"	9/16"	1/4"	3/16"	140,000	—	94361A135	0000	0000
				13/16"	5/16"-24	3/16"	9/16"	1/4"	3/16"	140,000	—	94361A342	0000	0000
				7/8"	5/16"-24	3/16"	9/16"	1/4"	3/16"	140,000	—	94361A343	0000	0000


				15/16"	5/16"-24	3/16"	9/16"	1/4"	3/16"	140,000	Digital	94361A344	0000	0000
				1"	5/16"-24	3/16"	9/16"	1/4"	3/16"	140,000	—	94361A136	0000	0000
				1 1/8"	5/16"-24	3/16"	9/16"	1/4"	3/16"	140,000	—	94361A345	0000	0000
				1 1/4"	5/16"-24	3/16"	9/16"	1/4"	3/16"	140,000	—	94361A137	0000	0000
				1 3/8"	5/16"-24	3/16"	9/16"	1/4"	3/16"	140,000	Digital	94361A346	0000	0000
				1 1/2"	5/16"-24	3/16"	9/16"	1/4"	3/16"	140,000	—	94361A138	0000	0000
				1 5/8"	5/16"-24	3/16"	9/16"	1/4"	3/16"	140,000	—	94361A347	0000	0000
				1 3/4"	5/16"-24	3/16"	9/16"	1/4"	3/16"	140,000	—	94361A348	0000	0000
				1 7/8"	5/16"-24	3/16"	9/16"	1/4"	3/16"	140,000	—	94361A349	0000	0000
				2"	5/16"-24	3/16"	9/16"	1/4"	3/16"	140,000	—	94361A139	00000	0000

Shoulder Shims


Shoulder Shortening	Shoulder Lengthening

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 Lengthening—Wiggle over threads to add space or increase travel along the shoulder of screws. Stack these shims to get the exact spacing you need.

		Shoulder Shortening				Shoulder Lengthening
	Thk.	For Screw Size	Pkg. Qty.		Pkg.	For Screw Size	Pkg. Qty.		Pkg.
Spring Steel







				For 3/8" Diameter Shoulder

				0.005"	5/16"	25	91124A014	000000	5/16"	25	91140A235	000000


				0.01"	5/16"	25	91124A062	0000	—	—	———	0
				0.015"	5/16"	25	91124A049	0000	5/16"	25	91140A247	00000
				0.02"	5/16"	25	91124A037	0000	—	—	———	0
				0.032"	5/16"	100	91124A180	00000	5/16"	25	91140A259	00000
				0.062"	5/16"	100	91124A080	00000	—	—	———	0

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.

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







				3/8" Diameter Shoulder (-0.004" to -0.002" Tolerance)

				1/8"	5/16"-24	3/8"	9/16"	1/4"	3/16"	70,000	ASME B18.3	—	97832A294	00000	00000


				1/4"	5/16"-24	3/8"	9/16"	1/4"	3/16"	70,000	ASME B18.3	—	97832A295	0000	0000
				5/16"	5/16"-24	3/8"	9/16"	1/4"	3/16"	70,000	ASME B18.3	—	97832A296	0000	0000
				3/8"	5/16"-24	3/8"	9/16"	1/4"	3/16"	70,000	ASME B18.3	Digital	97832A297	0000	0000
				1/2"	5/16"-24	3/8"	9/16"	1/4"	3/16"	70,000	ASME B18.3	Digital	97832A298	0000	0000
				3/4"	5/16"-24	3/8"	9/16"	1/4"	3/16"	70,000	ASME B18.3	Digital	97832A299	0000	0000
				1"	5/16"-24	3/8"	9/16"	1/4"	3/16"	70,000	ASME B18.3	—	97832A301	0000	0000
				1 1/4"	5/16"-24	3/8"	9/16"	1/4"	3/16"	70,000	ASME B18.3	Digital	97832A302	0000	0000
				1 1/2"	5/16"-24	3/8"	9/16"	1/4"	3/16"	70,000	ASME B18.3	Digital	97832A303	0000	0000
				1 3/4"	5/16"-24	3/8"	9/16"	1/4"	3/16"	70,000	ASME B18.3	—	97832A304	0000	0000
				2"	5/16"-24	3/8"	9/16"	1/4"	3/16"	70,000	ASME B18.3	Digital	97832A305	0000	0000


				2 1/2"	5/16"-24	3/8"	9/16"	1/4"	3/16"	70,000	ASME B18.3	—	97832A306	0000	0000
				3"	5/16"-24	3/8"	9/16"	1/4"	3/16"	70,000	ASME B18.3	Digital	97832A307	0000	0000


				Black-Oxide 18-8 Stainless Steel







								3/8" Diameter Shoulder (-0.004" to -0.002" Tolerance)

								1/8"	5/16"-24	3/8"	9/16"	1/4"	3/16"	70,000	ASME B18.3	—	97768A344	0000	0000


								1/4"	5/16"-24	3/8"	9/16"	1/4"	3/16"	70,000	ASME B18.3	—	97768A349	0000	0000
								3/8"	5/16"-24	3/8"	9/16"	1/4"	3/16"	70,000	ASME B18.3	Digital	97768A354	0000	0000
								1/2"	5/16"-24	3/8"	9/16"	1/4"	3/16"	70,000	ASME B18.3	—	97768A357	0000	0000
								3/4"	5/16"-24	3/8"	9/16"	1/4"	3/16"	70,000	ASME B18.3	—	97768A363	0000	0000
								2"	5/16"-24	3/8"	9/16"	1/4"	3/16"	70,000	ASME B18.3	—	97768A383	0000	0000
								2 1/2"	5/16"-24	3/8"	9/16"	1/4"	3/16"	70,000	ASME B18.3	—	97768A388	0000	0000

Shoulder Shims


Shoulder Shortening	Shoulder Lengthening

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 Lengthening—Wiggle over threads to add space or increase travel along the shoulder of screws. Stack these shims to get the exact spacing you need.

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







				For 3/8" Diameter Shoulder

				0.005"	5/16"	25	94773A614	00000	5/16"	50	90135A435	000000


				0.01"	5/16"	25	94773A655	00000	—	—	———	0
				0.016"	5/16"	25	94773A688	00000	5/16"	25	90135A447	00000
				0.02"	5/16"	25	94773A714	0000	—	—	———	0
				0.03"	5/16"	50	94773A745	00000	5/16"	25	90135A459	00000
				0.06"	5/16"	25	94773A774	0000	—	—	———	0

Same-Size Thread Stainless Steel Hex-Drive Shoulder Screws

Harness superior holding power with screws that also won't rust. Threads that match the shoulder diameter create a tighter hold than screws with a standard thread diameter. Use them in thicker materials and larger holes. While more corrosion resistant than alloy steel screws, they're not as strong.

Check out our Made-to-Order Same-Size Thread 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.

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







				5/16" Diameter Shoulder (-0.004" to -0.002" Tolerance)

				1/4"	5/16"-24	7/16"	7/16"	7/32"	5/32"	70,000	—	91273A189	00000	00000


				3/8"	5/16"-24	7/16"	7/16"	7/32"	5/32"	70,000	—	91273A191	0000	0000
				1/2"	5/16"-24	7/16"	7/16"	7/32"	5/32"	70,000	—	91273A918	0000	0000
				5/8"	5/16"-24	7/16"	7/16"	7/32"	5/32"	70,000	—	91273A193	0000	0000
				3/4"	5/16"-24	7/16"	7/16"	7/32"	5/32"	70,000	—	91273A919	0000	0000
				1"	5/16"-24	7/16"	7/16"	7/32"	5/32"	70,000	Digital	91273A195	0000	0000
				1 1/4"	5/16"-24	7/16"	7/16"	7/32"	5/32"	70,000	—	91273A196	0000	0000
				1 1/2"	5/16"-24	7/16"	7/16"	7/32"	5/32"	70,000	—	91273A921	00000	0000
				1 3/4"	5/16"-24	7/16"	7/16"	7/32"	5/32"	70,000	—	91273A199	00000	0000
				2"	5/16"-24	7/16"	7/16"	7/32"	5/32"	70,000	—	91273A201	00000	00000


				Black-Oxide 18-8 Stainless Steel







								5/16" Diameter Shoulder (-0.004" to -0.002" Tolerance)

								1/4"	5/16"-24	7/16"	7/16"	7/32"	5/32"	70,000	—	91273A613	0000	0000


								3/8"	5/16"-24	7/16"	7/16"	7/32"	5/32"	70,000	Digital	91273A614	0000	0000
								1/2"	5/16"-24	7/16"	7/16"	7/32"	5/32"	70,000	—	91273A615	0000	0000
								5/8"	5/16"-24	7/16"	7/16"	7/32"	5/32"	70,000	—	91273A616	0000	0000
								3/4"	5/16"-24	7/16"	7/16"	7/32"	5/32"	70,000	Digital	91273A617	0000	0000
								1"	5/16"-24	7/16"	7/16"	7/32"	5/32"	70,000	Digital	91273A618	00000	0000
								1 1/4"	5/16"-24	7/16"	7/16"	7/32"	5/32"	70,000	Digital	91273A619	00000	0000
								1 1/2"	5/16"-24	7/16"	7/16"	7/32"	5/32"	70,000	Digital	91273A621	00000	0000
								1 3/4"	5/16"-24	7/16"	7/16"	7/32"	5/32"	70,000	—	91273A939	00000	00000
								2"	5/16"-24	7/16"	7/16"	7/32"	5/32"	70,000	—	91273A623	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 5/16" Diameter Shoulder

				0.005"	1/4"	50	94773A612	00000


				0.01"	1/4"	25	94773A653	0000
				0.016"	1/4"	25	94773A686	0000
				0.02"	1/4"	25	94773A712	0000
				0.03"	1/4"	100	94773A743	00000
				0.06"	1/4"	25	94773A772	0000

Eyebolts—For Lifting

Also known as machinery eyebolts.

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. Eyebolts without shoulder are for vertical lifting only.

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

Steel

Closed Eye

With Shoulder

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

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



		5/16"-24	1 1/8"	1 1/8"	7/8"	900	Fully Threaded	2 3/4"	3014T257	00000

Zinc-Plated Steel

Closed Eye

With Shoulder

Zinc-plated steel eyebolts offer good corrosion resistance.

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

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



		5/16"-24	1 1/8"	1 1/8"	7/8"	900	Fully Threaded	2 3/4"	3014T108	00000