M16 Shoulder Bolts | McMaster-Carr

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120 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						Each
	Shoulder Lg., mm	Thread Size	Thread Lg., mm	Dia.	Ht.	Drive Size, mm	Tensile Strength, psi	Specs. Met		1-4	5-Up
Black-Oxide Alloy Steel







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

				20	M16 × 2 mm	22	30	14	10	140,000	ISO 7379	000000000	000000	000000


				25	M16 × 2 mm	22	30	14	10	140,000	ISO 7379	000000000	00000	00000
				30	M16 × 2 mm	22	30	14	10	140,000	ISO 7379	000000000	00000	00000
				35	M16 × 2 mm	22	30	14	10	140,000	ISO 7379	000000000	00000	00000
				40	M16 × 2 mm	22	30	14	10	140,000	ISO 7379	000000000	00000	00000
				45	M16 × 2 mm	22	30	14	10	140,000	ISO 7379	000000000	00000	00000
				50	M16 × 2 mm	22	30	14	10	140,000	ISO 7379	000000000	00000	00000
				55	M16 × 2 mm	22	30	14	10	140,000	ISO 7379	000000000	00000	00000
				60	M16 × 2 mm	22	30	14	10	140,000	ISO 7379	000000000	00000	00000
				70	M16 × 2 mm	22	30	14	10	140,000	ISO 7379	000000000	00000	00000
				80	M16 × 2 mm	22	30	14	10	140,000	ISO 7379	000000000	00000	00000


				90	M16 × 2 mm	22	30	14	10	140,000	ISO 7379	000000000	00000	00000
				100	M16 × 2 mm	22	30	14	10	140,000	ISO 7379	000000000	00000	00000
				120	M16 × 2 mm	22	30	14	10	140,000	ISO 7379	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 20 mm Diameter Shoulder

				0.015"	M20	5	000000000	00000	—	—	———	0


				0.02"	M20	5	000000000	0000	—	—	———	0
				0.031"	—	—	———	0	M16	5	000000000	00000
				0.06"	M20	5	000000000	0000	—	—	———	0

Steel Hex Head Shoulder Screws

Create the tightest hold by generating more torque than you could with a socket head. Make sure there's room to fasten with a wrench or socket driver, as the drive is on the outside.

									Each
	Shoulder Lg., mm	Thread Size	Thread Lg., mm	Head Wd., mm	Head Ht., mm	Tensile Strength, psi	Specs. Met		1-4	5-Up
Steel







				17 mm Diameter Shoulder (0.001 mm to 0.012 mm Tolerance)

				21.5	M16 × 2 mm	27	24	10	120,000	DIN 609	000000000	000000	00000


				29.5	M16 × 2 mm	27	24	10	120,000	DIN 609	000000000	00000	0000
				39.5	M16 × 2 mm	27	24	10	120,000	DIN 609	000000000	00000	00000
				49.5	M16 × 2 mm	27	24	10	120,000	DIN 609	000000000	00000	00000
				59.5	M16 × 2 mm	27	24	10	120,000	DIN 609	000000000	00000	00000
				69.5	M16 × 2 mm	27	24	10	120,000	DIN 609	000000000	00000	00000

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.

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







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

				14	M16 × 2 mm	22	30	14	10	70,000	ISO 7379	—	000000000	000000	000000


				20	M16 × 2 mm	22	30	14	10	70,000	ISO 7379	—	000000000	00000	00000
				25	M16 × 2 mm	22	30	14	10	70,000	ISO 7379	—	000000000	00000	00000
				30	M16 × 2 mm	22	30	14	10	70,000	ISO 7379	—	000000000	00000	00000
				35	M16 × 2 mm	22	30	14	10	70,000	ISO 7379	—	000000000	00000	00000
				45	M16 × 2 mm	22	30	14	10	70,000	ISO 7379	—	000000000	00000	00000
				50	M16 × 2 mm	22	30	14	10	70,000	ISO 7379	—	000000000	00000	00000
				55	M16 × 2 mm	22	30	14	10	70,000	ISO 7379	—	000000000	00000	00000
				60	M16 × 2 mm	22	30	14	10	70,000	ISO 7379	—	000000000	00000	00000


				Highly-Corrosion-Resistant 316 Stainless Steel







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

								12	M16 × 2 mm	22	30	14	10	70,000	ISO 7379	—	000000000	00000	00000


								14	M16 × 2 mm	22	30	14	10	70,000	ISO 7379	—	000000000	00000	00000
								16	M16 × 2 mm	22	30	14	10	70,000	ISO 7379	—	000000000	00000	00000
								20	M16 × 2 mm	22	30	14	10	70,000	ISO 7379	—	000000000	00000	00000
								35	M16 × 2 mm	22	30	14	10	70,000	ISO 7379	—	000000000	00000	00000
								40	M16 × 2 mm	22	30	14	10	70,000	ISO 7379	—	000000000	00000	00000
								50	M16 × 2 mm	22	30	14	10	70,000	ISO 7379	—	000000000	00000	00000
								55	M16 × 2 mm	22	30	14	10	70,000	ISO 7379	—	000000000	00000	00000
								60	M16 × 2 mm	22	30	14	10	70,000	ISO 7379	—	000000000	00000	00000
								70	M16 × 2 mm	22	30	14	10	70,000	ISO 7379	—	000000000	00000	00000
								100	M16 × 2 mm	22	30	14	10	70,000	ISO 7379	Digital	000000000	00000	00000


								110	M16 × 2 mm	22	30	14	10	70,000	ISO 7379	—	000000000	00000	00000
								120	M16 × 2 mm	22	30	14	10	70,000	ISO 7379	—	000000000	00000	00000


								Highly-Corrosion-Resistant Black-Oxide 316 Stainless Steel







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

												12	M16 × 2 mm	22	30	14	10	70,000	ISO 7379	Digital	000000000	00000	00000


14												M16 × 2 mm	22	30	14	10	70,000	ISO 7379	Digital	000000000	00000	00000
16	M16 × 2 mm											22	30	14	10	70,000	ISO 7379	Digital	000000000	00000	00000
20	M16 × 2 mm											22	30	14	10	70,000	ISO 7379	Digital	000000000	00000	00000
25	M16 × 2 mm											22	30	14	10	70,000	ISO 7379	Digital	000000000	00000	00000
30	M16 × 2 mm											22	30	14	10	70,000	ISO 7379	Digital	000000000	00000	00000
35	M16 × 2 mm	22										30	14	10	70,000	ISO 7379	Digital	000000000	00000	00000
40	M16 × 2 mm	22	30									14	10	70,000	ISO 7379	Digital	000000000	00000	00000
45	M16 × 2 mm	22	30									14	10	70,000	ISO 7379	Digital	000000000	00000	00000
50	M16 × 2 mm	22	30									14	10	70,000	ISO 7379	Digital	000000000	00000	00000
55	M16 × 2 mm	22	30									14	10	70,000	ISO 7379	Digital	000000000	00000	00000


60	M16 × 2 mm	22	30									14	10	70,000	ISO 7379	Digital	000000000	00000	00000
70	M16 × 2 mm	22	30									14	10	70,000	ISO 7379	Digital	000000000	00000	00000
80	M16 × 2 mm	22	30									14	10	70,000	ISO 7379	Digital	000000000	00000	00000
90	M16 × 2 mm	22	30									14	10	70,000	ISO 7379	Digital	000000000	00000	00000
100	M16 × 2 mm	22	30									14	10	70,000	ISO 7379	Digital	000000000	00000	00000
110	M16 × 2 mm	22	30									14	10	70,000	ISO 7379	Digital	000000000	00000	00000
120	M16 × 2 mm	22	30									14	10	70,000	ISO 7379	Digital	000000000	00000	00000
130	M16 × 2 mm	22	30									14	10	70,000	ISO 7379	Digital	000000000	00000	00000
140	M16 × 2 mm	22	30									14	10	70,000	ISO 7379	—	000000000	00000	00000
150	M16 × 2 mm	22	30									14	10	70,000	ISO 7379	—	000000000	00000	00000


160	M16 × 2 mm	22	30	14	10							70,000	ISO 7379	Digital	000000000	00000	00000
170	M16 × 2 mm	22	30	14	10							70,000	ISO 7379	Digital	000000000	00000	00000
180	M16 × 2 mm	22	30	14	10							70,000	ISO 7379	Digital	000000000	00000	00000
190	M16 × 2 mm	22	30	14	10							70,000	ISO 7379	Digital	000000000	000000	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 20 mm Diameter Shoulder

				0.005"	M20	5	000000000	000000	M16	10	000000000	000000


				0.01"	M20	5	000000000	00000	M16	10	000000000	00000
				0.015"	M20	5	000000000	0000	M16	10	000000000	00000
				0.02"	M20	5	000000000	00000	M16	10	000000000	00000
				0.025"	M20	5	000000000	00000	M16	5	000000000	00000
				0.031"	M20	5	000000000	00000	M16	5	000000000	00000
				0.062"	M20	5	000000000	00000	—	—	———	0


				Highly-Corrosion-Resistant 316 Stainless Steel







								For 20 mm Diameter Shoulder

								0.005"	M20	5	000000000	0000	—	—	———	0


								0.01"	M20	5	000000000	0000	—	—	———	0
								0.031"	M20	5	000000000	0000	M16	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, mm						Each
	Shoulder Lg., mm	Thread Size	Thread Lg., mm	Dia.	Ht.	Drive Size, mm	Tensile Strength, psi	Material Certificate Form		1-4	5-Up
18-8 Stainless Steel







				16 mm Diameter Shoulder (-0.04 mm to -0.01 mm Tolerance)

				20	M16 × 2 mm	22	24	11	8	70,000	—	000000000	000000	000000


				25	M16 × 2 mm	22	24	11	8	70,000	—	000000000	00000	00000
				30	M16 × 2 mm	22	24	11	8	70,000	—	000000000	00000	00000
				35	M16 × 2 mm	22	24	11	8	70,000	—	000000000	00000	00000
				40	M16 × 2 mm	22	24	11	8	70,000	Digital	000000000	00000	00000
				45	M16 × 2 mm	22	24	11	8	70,000	—	000000000	00000	00000
				50	M16 × 2 mm	22	24	11	8	70,000	—	000000000	00000	00000
				60	M16 × 2 mm	22	24	11	8	70,000	—	000000000	00000	00000
				120	M16 × 2 mm	22	24	11	8	70,000	—	000000000	000000	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 16 mm Diameter Shoulder

				0.005"	M16	5	000000000	00000


				0.01"	M16	5	000000000	0000
				0.015"	M16	5	000000000	0000
				0.02"	M16	5	000000000	00000
				0.025"	M16	5	000000000	00000
				0.031"	M16	5	000000000	00000
				0.062"	M16	5	000000000	0000

Made-to-Order Same-Size Thread Stainless Steel Hex-Drive Shoulder Screws

Harness superior holding power with custom-shoulder-length screws that also won't rust. These are ideal for replacing fasteners in older machines or for testing prototypes. Threads that match the shoulder diameter give them a tighter hold than screws with a standard thread diameter. Use them in thicker materials and larger holes.

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







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

				6.00 to 49.75	M16 × 2 mm	18	24	11	8	70,000	Digital	000000000	000000	000000	000000


				50.00 to 99.75	M16 × 2 mm	18	24	11	8	70,000	Digital	000000000	00000	00000	00000

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







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

				13.00 to 49.75	M16 × 2 mm	22	30	14	10	70,000	Digital	000000000	000000	000000	000000


				50.00 to 99.75	M16 × 2 mm	22	30	14	10	70,000	Digital	000000000	00000	00000	00000




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

						13.00 to 49.75	M16 × 2 mm	27	36	16	12	70,000	Digital	000000000	00000	00000	00000


						50.00 to 99.75	M16 × 2 mm	27	36	16	12	70,000	Digital	000000000	00000	00000	00000

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



		M16 × 2 mm	32	32	35	3,500	Fully Threaded	108	0000000	000000


		M16 × 2 mm	76	76	35	3,500	Fully Threaded	151	0000000	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., mm	Shank Lg., mm	Eye Dia., mm	Vert. Cap., lb.	Specs. Met	Threading	Overall Lg., mm		Each
Closed Eye



		M16 × 2 mm	27	27	35	1,525	DIN 580	Fully Threaded	89	0000000	000000

Galvanized Steel

Closed Eye

With Shoulder

Galvanized steel eyebolts have a hot-dipped finish for more corrosion resistance than zinc-plated steel.

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

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



		M16 × 2 mm	45	45	35	3,500	Fully Threaded	121	0000000	000000

304 Stainless Steel

Closed Eye

With Shoulder

304 stainless steel eyebolts are more corrosion resistant than galvanized steel.

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

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



		M16 × 2 mm	27	27	35	1,525	DIN 580	Fully Threaded	89	0000000	000000

316 Stainless Steel

Closed Eye

With Shoulder

316 stainless steel eyebolts are the most corrosion resistant.

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

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



		M16 × 2 mm	27	27	35	1,525	DIN 580	Fully Threaded	89	0000000	000000

Rotating Eyebolts—For Lifting

Unlike conventional eyebolts, you can rotate the eye 360° to match the angle of your load.

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

Powder-Coated Steel

Powder-coated steel eyebolts are impact resistant, but less corrosion resistant than stainless steel eyebolts. They include a removable key for tightening the bolt.

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

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



		M16 × 2 mm	24	24	35	3,300	Fully Threaded	Pink	88	0000000	0000000

Stainless Steel

Stainless steel eyebolts are more corrosion resistant than powder-coated steel eyebolts.

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

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



		M16 × 2 mm	9	24	35	2,200	Fully Threaded	Gray	90	00000000	0000000

Eyebolts with Nuts—For Lifting

Also known as nut eyebolts, these are designed for through-hole applications.

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

316 Stainless Steel

Closed Eye

With Shoulder

316 stainless steel eyebolts are the most corrosion resistant.

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

	Thread						Nuts			With Shoulder
	Size	Lg., mm	Shank Lg., mm	Eye Dia., mm	Vert. Cap., lb.	Threading	Number Included	Type	No. of Washers Included	Overall Lg., mm		Each
Closed Eye



		M16 × 2 mm	45	51	31	3,425	Partially Threaded	1	Hex	1	113	0000000	000000

Nylon-Coated Eyebolts—For Lifting

Route wire and cable through the smooth eye without snagging.

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

Nylon-Coated Steel

Closed Eye

With Shoulder

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

	Thread							With Shoulder
	Size	Lg., mm	Shank Lg., mm	Eye Dia., mm	Vert. Cap., lb.	Threading	Temp. Range, ° F	Overall Lg., mm		Each
Closed Eye



		M16 × 2 mm	32	32	35	3,500	Fully Threaded	30 to 275	106	0000000	000000