3/8"-24 Shoulder Bolts | McMaster-Carr

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60,000 psi to 80,999 psi

100,000 psi or greater

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Black Oxide

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Right Hand

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







				1/2" Diameter Shoulder (-0.004" to -0.002" Tolerance)

				1/4"	3/8"-24	13/64"	3/4"	5/16"	1/4"	140,000	—	—	94361A141	00000	00000


				5/16"	3/8"-24	13/64"	3/4"	5/16"	1/4"	140,000	—	—	94361A351	0000	0000
				3/8"	3/8"-24	13/64"	3/4"	5/16"	1/4"	140,000	—	—	94361A142	0000	0000
				7/16"	3/8"-24	13/64"	3/4"	5/16"	1/4"	140,000	—	—	94361A352	0000	0000
				1/2"	3/8"-24	13/64"	3/4"	5/16"	1/4"	140,000	—	—	94361A143	0000	0000
				9/16"	3/8"-24	13/64"	3/4"	5/16"	1/4"	140,000	Material Certificate	Digital	94361A353	0000	0000
				5/8"	3/8"-24	13/64"	3/4"	5/16"	1/4"	140,000	—	—	94361A144	00000	0000
				11/16"	3/8"-24	13/64"	3/4"	5/16"	1/4"	140,000	—	—	94361A354	0000	0000
				3/4"	3/8"-24	13/64"	3/4"	5/16"	1/4"	140,000	—	—	94361A145	00000	0000
				13/16"	3/8"-24	13/64"	3/4"	5/16"	1/4"	140,000	Material Certificate	Digital	94361A355	00000	0000
				7/8"	3/8"-24	13/64"	3/4"	5/16"	1/4"	140,000	—	—	94361A356	0000	0000


				15/16"	3/8"-24	13/64"	3/4"	5/16"	1/4"	140,000	Material Certificate	Digital	94361A357	00000	00000
				1"	3/8"-24	13/64"	3/4"	5/16"	1/4"	140,000	—	—	94361A146	00000	0000
				1 1/8"	3/8"-24	13/64"	3/4"	5/16"	1/4"	140,000	—	—	94361A358	00000	00000
				1 1/4"	3/8"-24	13/64"	3/4"	5/16"	1/4"	140,000	—	—	94361A147	00000	00000
				1 3/8"	3/8"-24	13/64"	3/4"	5/16"	1/4"	140,000	—	—	94361A359	00000	0000
				1 1/2"	3/8"-24	13/64"	3/4"	5/16"	1/4"	140,000	—	—	94361A148	00000	00000
				1 5/8"	3/8"-24	13/64"	3/4"	5/16"	1/4"	140,000	Material Certificate	Digital	94361A361	00000	0000
				1 3/4"	3/8"-24	13/64"	3/4"	5/16"	1/4"	140,000	—	—	94361A362	00000	00000
				1 7/8"	3/8"-24	13/64"	3/4"	5/16"	1/4"	140,000	Material Certificate	Digital	94361A363	00000	00000
				2"	3/8"-24	13/64"	3/4"	5/16"	1/4"	140,000	—	—	94361A149	00000	00000

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 1/2" Diameter Shoulder

				0.005"	3/8"	10	91124A016	000000	3/8"	25	91140A237	000000


				0.01"	3/8"	25	91124A063	0000	—	—	———	0
				0.015"	3/8"	25	91124A050	0000	3/8"	25	91140A249	00000
				0.02"	3/8"	25	91124A038	0000	—	—	———	0
				0.032"	3/8"	50	91124A190	00000	3/8"	25	91140A261	00000
				0.062"	3/8"	50	91124A090	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.

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







				1/2" Diameter Shoulder (-0.004" to -0.002" Tolerance)

				1/4"	3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	—	—	97832A127	00000	00000


				5/16"	3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	—	—	97832A128	0000	0000
				3/8"	3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	—	—	97832A129	0000	0000
				1/2"	3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	—	—	97832A130	0000	0000
				3/4"	3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	Material Certificate	Digital	97832A131	0000	0000
				1"	3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	Material Certificate	Digital	97832A132	0000	0000
				1 1/4"	3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	—	—	97832A133	0000	0000
				1 1/2"	3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	—	—	97832A134	0000	0000
				1 3/4"	3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	—	—	97832A135	0000	0000
				2"	3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	Material Certificate	Digital	97832A136	00000	0000
				2 1/2"	3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	Material Certificate	Digital	97832A137	00000	00000


				3"	3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	Material Certificate	Digital	97832A138	00000	00000


				Black-Oxide 18-8 Stainless Steel







								1/2" Diameter Shoulder (-0.004" to -0.002" Tolerance)

								3/8"	3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	Material Certificate	Digital	97768A414	0000	0000


								1/2"	3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	Material Certificate	Digital	97768A418	0000	0000
								3/4"	3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	—	—	97768A422	0000	0000
								1 1/2"	3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	—	—	97768A434	0000	0000


								Highly Corrosion-Resistant 316 Stainless Steel







												1/2" Diameter Shoulder (-0.004" to -0.002" Tolerance)

												1/4"	3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	—	—	97345A630	0000	0000


												5/16"	3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	Material Certificate	Digital	97345A640	0000	0000
												3/8"	3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	—	—	97345A652	0000	0000
												1/2"	3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	—	—	97345A658	0000	0000
												3/4"	3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	—	—	97345A664	0000	0000
												1"	3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	Material Certificate	Digital	97345A669	0000	0000
												1 1/4"	3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	—	—	97345A674	0000	0000
1 1/2"												3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	—	—	97345A687	00000	0000
1 3/4"	3/8"-24											1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	—	—	97345A692	00000	00000
2"	3/8"-24											1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	—	—	97345A702	00000	00000
2 1/2"	3/8"-24											1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	Material Certificate	Digital	97345A709	00000	00000


3"	3/8"-24	1/2"	3/4"									5/16"	1/4"	70,000	ASME B18.3	Material Certificate	Digital	97345A734	00000	00000


Highly Corrosion-Resistant Black-Oxide 316 Stainless Steel







												1/2" Diameter Shoulder (-0.004" to -0.002" Tolerance)

												1/4"	3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	Material Certificate	Digital	8077A354	00000	0000


												5/16"	3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	Material Certificate	Digital	8077A357	00000	0000
												3/8"	3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	Material Certificate	Digital	8077A356	00000	0000
												1/2"	3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	Material Certificate	Digital	8077A353	00000	0000
												3/4"	3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	Material Certificate	Digital	8077A355	00000	0000
												1"	3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	Material Certificate	Digital	8077A345	00000	00000
												1 1/4"	3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	Material Certificate	Digital	8077A351	00000	00000
												1 1/2"	3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	Material Certificate	Digital	8077A348	00000	00000
				1 3/4"								3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	Material Certificate	Digital	8077A352	00000	00000
				2"	3/8"-24							1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	Material Certificate	Digital	8077A346	00000	00000
				2 1/2"	3/8"-24							1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	—	—	8077A349	00000	00000


				3"	3/8"-24	1/2"						3/4"	5/16"	1/4"	70,000	ASME B18.3	Material Certificate	Digital	8077A347	00000	00000

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 1/2" Diameter Shoulder

				0.005"	3/8"	25	94773A616	00000	3/8"	25	90135A437	000000


				0.01"	3/8"	25	94773A657	00000	—	—	———	0
				0.016"	3/8"	25	94773A689	00000	3/8"	25	90135A449	00000
				0.02"	3/8"	25	94773A716	00000	—	—	———	0
				0.03"	3/8"	50	94773A747	00000	3/8"	25	90135A461	00000
				0.06"	3/8"	25	94773A776	0000	—	—	———	0


				Highly Corrosion-Resistant 316 Stainless Steel







								For 1/2" Diameter Shoulder

								0.005"	3/8"	10	90792A245	00000	3/8"	10	91017A475	00000


								0.01"	3/8"	10	90792A345	00000	—	—	———	0
								0.016"	—	—	———	0	3/8"	10	91017A575	00000
								0.03"	3/8"	10	90792A445	00000	3/8"	10	91017A675	00000

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







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

				1/4"	3/8"-24	1/2"	9/16"	1/4"	3/16"	70,000	—	—	91273A217	00000	00000


				3/8"	3/8"-24	1/2"	9/16"	1/4"	3/16"	70,000	—	—	91273A219	0000	0000
				1/2"	3/8"-24	1/2"	9/16"	1/4"	3/16"	70,000	Material Certificate	Digital	91273A221	0000	0000
				5/8"	3/8"-24	1/2"	9/16"	1/4"	3/16"	70,000	Material Certificate	Digital	91273A222	0000	0000
				3/4"	3/8"-24	1/2"	9/16"	1/4"	3/16"	70,000	—	—	91273A223	0000	0000
				1"	3/8"-24	1/2"	9/16"	1/4"	3/16"	70,000	Material Certificate	Digital	91273A224	00000	0000
				1 1/4"	3/8"-24	1/2"	9/16"	1/4"	3/16"	70,000	—	—	91273A225	00000	0000
				1 1/2"	3/8"-24	1/2"	9/16"	1/4"	3/16"	70,000	—	—	91273A226	00000	00000
				1 3/4"	3/8"-24	1/2"	9/16"	1/4"	3/16"	70,000	—	—	91273A227	00000	00000
				2"	3/8"-24	1/2"	9/16"	1/4"	3/16"	70,000	—	—	91273A228	00000	00000


				Black-Oxide 18-8 Stainless Steel







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

								1/4"	3/8"-24	1/2"	9/16"	1/4"	3/16"	70,000	—	—	91273A645	0000	0000


								5/16"	3/8"-24	1/2"	9/16"	1/4"	3/16"	70,000	Material Certificate	Digital	91273A646	0000	0000
								3/8"	3/8"-24	1/2"	9/16"	1/4"	3/16"	70,000	Material Certificate	Digital	91273A647	0000	0000
								1/2"	3/8"-24	1/2"	9/16"	1/4"	3/16"	70,000	—	—	91273A648	0000	0000
								5/8"	3/8"-24	1/2"	9/16"	1/4"	3/16"	70,000	—	—	91273A649	0000	0000
								3/4"	3/8"-24	1/2"	9/16"	1/4"	3/16"	70,000	—	—	91273A651	00000	0000
								1"	3/8"-24	1/2"	9/16"	1/4"	3/16"	70,000	—	—	91273A652	00000	0000
								1 1/4"	3/8"-24	1/2"	9/16"	1/4"	3/16"	70,000	—	—	91273A653	00000	00000
								2"	3/8"-24	1/2"	9/16"	1/4"	3/16"	70,000	—	—	91273A656	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 3/8" Diameter Shoulder

				0.005"	5/16"	25	94773A614	00000


				0.01"	5/16"	25	94773A655	00000
				0.016"	5/16"	25	94773A688	00000
				0.02"	5/16"	25	94773A714	0000
				0.03"	5/16"	50	94773A745	00000
				0.06"	5/16"	25	94773A774	0000

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.	Shank Lg.	Eye Dia.	Vert. Cap., lb.	Threading	Overall Lg.		Each
Closed Eye



		3/8"-24	1 1/4"	1 1/4"	1"	1,400	Fully Threaded	3 1/4"	3014T258	000000