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

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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						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







				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	—	000000000	00000	00000


				5/16"	3/8"-24	13/64"	3/4"	5/16"	1/4"	140,000	—	000000000	0000	0000
				3/8"	3/8"-24	13/64"	3/4"	5/16"	1/4"	140,000	—	000000000	0000	0000
				7/16"	3/8"-24	13/64"	3/4"	5/16"	1/4"	140,000	—	000000000	0000	0000
				1/2"	3/8"-24	13/64"	3/4"	5/16"	1/4"	140,000	—	000000000	0000	0000
				9/16"	3/8"-24	13/64"	3/4"	5/16"	1/4"	140,000	Digital	000000000	0000	0000
				5/8"	3/8"-24	13/64"	3/4"	5/16"	1/4"	140,000	—	000000000	00000	0000
				11/16"	3/8"-24	13/64"	3/4"	5/16"	1/4"	140,000	—	000000000	0000	0000
				3/4"	3/8"-24	13/64"	3/4"	5/16"	1/4"	140,000	—	000000000	00000	0000
				13/16"	3/8"-24	13/64"	3/4"	5/16"	1/4"	140,000	—	000000000	00000	0000
				7/8"	3/8"-24	13/64"	3/4"	5/16"	1/4"	140,000	—	000000000	0000	0000


				15/16"	3/8"-24	13/64"	3/4"	5/16"	1/4"	140,000	Digital	000000000	00000	00000
				1"	3/8"-24	13/64"	3/4"	5/16"	1/4"	140,000	—	000000000	00000	0000
				1 1/8"	3/8"-24	13/64"	3/4"	5/16"	1/4"	140,000	—	000000000	00000	00000
				1 1/4"	3/8"-24	13/64"	3/4"	5/16"	1/4"	140,000	—	000000000	00000	00000
				1 3/8"	3/8"-24	13/64"	3/4"	5/16"	1/4"	140,000	—	000000000	00000	0000
				1 1/2"	3/8"-24	13/64"	3/4"	5/16"	1/4"	140,000	—	000000000	00000	00000
				1 5/8"	3/8"-24	13/64"	3/4"	5/16"	1/4"	140,000	Digital	000000000	00000	0000
				1 3/4"	3/8"-24	13/64"	3/4"	5/16"	1/4"	140,000	—	000000000	00000	00000
				1 7/8"	3/8"-24	13/64"	3/4"	5/16"	1/4"	140,000	Digital	000000000	00000	00000
				2"	3/8"-24	13/64"	3/4"	5/16"	1/4"	140,000	—	000000000	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	000000000	000000	3/8"	25	000000000	000000


				0.01"	3/8"	25	000000000	0000	—	—	———	0
				0.015"	3/8"	25	000000000	0000	3/8"	25	000000000	00000
				0.02"	3/8"	25	000000000	0000	—	—	———	0
				0.032"	3/8"	50	000000000	00000	3/8"	25	000000000	00000
				0.062"	3/8"	50	000000000	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							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







				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	—	000000000	00000	00000


				5/16"	3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	—	000000000	0000	0000
				3/8"	3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	—	000000000	0000	0000
				1/2"	3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	—	000000000	0000	0000
				3/4"	3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	Digital	000000000	0000	0000
				1"	3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	—	000000000	0000	0000
				1 1/4"	3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	—	000000000	0000	0000
				1 1/2"	3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	—	000000000	0000	0000
				1 3/4"	3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	—	000000000	0000	0000
				2"	3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	—	000000000	00000	0000
				2 1/2"	3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	—	000000000	00000	00000


				3"	3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	—	000000000	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	—	000000000	0000	0000


								1/2"	3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	—	000000000	0000	0000
								3/4"	3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	—	000000000	0000	0000
								1 1/2"	3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	—	000000000	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	—	000000000	0000	0000


												5/16"	3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	—	000000000	0000	0000
												3/8"	3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	—	000000000	0000	0000
												1/2"	3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	—	000000000	0000	0000
												3/4"	3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	—	000000000	0000	0000
												1"	3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	—	000000000	0000	0000
												1 1/4"	3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	—	000000000	0000	0000
1 1/2"												3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	—	000000000	00000	0000
1 3/4"	3/8"-24											1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	—	000000000	00000	00000
2"	3/8"-24											1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	—	000000000	00000	00000
2 1/2"	3/8"-24											1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	Digital	000000000	00000	00000


3"	3/8"-24	1/2"	3/4"									5/16"	1/4"	70,000	ASME B18.3	Digital	000000000	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	Digital	00000000	00000	0000


												5/16"	3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	Digital	00000000	00000	0000
												3/8"	3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	Digital	00000000	00000	0000
												1/2"	3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	Digital	00000000	00000	0000
												3/4"	3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	Digital	00000000	00000	0000
												1"	3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	Digital	00000000	00000	00000
												1 1/4"	3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	Digital	00000000	00000	00000
												1 1/2"	3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	Digital	00000000	00000	00000
				1 3/4"								3/8"-24	1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	Digital	00000000	00000	00000
				2"	3/8"-24							1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	Digital	00000000	00000	00000
				2 1/2"	3/8"-24							1/2"	3/4"	5/16"	1/4"	70,000	ASME B18.3	—	00000000	00000	00000


				3"	3/8"-24	1/2"						3/4"	5/16"	1/4"	70,000	ASME B18.3	Digital	00000000	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	000000000	00000	3/8"	25	000000000	000000


				0.01"	3/8"	25	000000000	00000	—	—	———	0
				0.016"	3/8"	25	000000000	00000	3/8"	25	000000000	00000
				0.02"	3/8"	25	000000000	00000	—	—	———	0
				0.03"	3/8"	50	000000000	00000	3/8"	25	000000000	00000
				0.06"	3/8"	25	000000000	0000	—	—	———	0


				Highly-Corrosion-Resistant 316 Stainless Steel







								For 1/2" Diameter Shoulder

								0.005"	3/8"	10	000000000	00000	3/8"	10	000000000	00000


								0.01"	3/8"	10	000000000	00000	—	—	———	0
								0.016"	—	—	———	0	3/8"	10	000000000	00000
								0.03"	3/8"	10	000000000	00000	3/8"	10	000000000	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					Each
	Shoulder Lg.	Thread Size	Thread Lg.	Dia.	Ht.	Drive Size	Tensile Strength, psi		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	000000000	00000	00000


				3/8"	3/8"-24	1/2"	9/16"	1/4"	3/16"	70,000	000000000	0000	0000
				1/2"	3/8"-24	1/2"	9/16"	1/4"	3/16"	70,000	000000000	0000	0000
				5/8"	3/8"-24	1/2"	9/16"	1/4"	3/16"	70,000	000000000	0000	0000
				3/4"	3/8"-24	1/2"	9/16"	1/4"	3/16"	70,000	000000000	0000	0000
				1"	3/8"-24	1/2"	9/16"	1/4"	3/16"	70,000	000000000	00000	0000
				1 1/4"	3/8"-24	1/2"	9/16"	1/4"	3/16"	70,000	000000000	00000	0000
				1 1/2"	3/8"-24	1/2"	9/16"	1/4"	3/16"	70,000	000000000	00000	00000
				1 3/4"	3/8"-24	1/2"	9/16"	1/4"	3/16"	70,000	000000000	00000	00000
				2"	3/8"-24	1/2"	9/16"	1/4"	3/16"	70,000	000000000	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	000000000	0000	0000


								5/16"	3/8"-24	1/2"	9/16"	1/4"	3/16"	70,000	000000000	0000	0000
								3/8"	3/8"-24	1/2"	9/16"	1/4"	3/16"	70,000	000000000	0000	0000
								1/2"	3/8"-24	1/2"	9/16"	1/4"	3/16"	70,000	000000000	0000	0000
								5/8"	3/8"-24	1/2"	9/16"	1/4"	3/16"	70,000	000000000	0000	0000
								3/4"	3/8"-24	1/2"	9/16"	1/4"	3/16"	70,000	000000000	00000	0000
								1"	3/8"-24	1/2"	9/16"	1/4"	3/16"	70,000	000000000	00000	0000
								1 1/4"	3/8"-24	1/2"	9/16"	1/4"	3/16"	70,000	000000000	00000	00000
								2"	3/8"-24	1/2"	9/16"	1/4"	3/16"	70,000	000000000	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	000000000	00000


				0.01"	5/16"	25	000000000	00000
				0.016"	5/16"	25	000000000	00000
				0.02"	5/16"	25	000000000	0000
				0.03"	5/16"	50	000000000	00000
				0.06"	5/16"	25	000000000	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



		3/8"-24	1 1/4"	1 1/4"	1"	1,400	Fully Threaded	3 1/4"	00000000	000000