9/16"-18 Threaded Rods | McMaster-Carr

Filter by

System of Measurement

Thread Size

Length

Material

Threading

Component

Nut Type

Thread Direction

Fastener Strength Grade/Class

Thread Type

Thread Spacing

Travel Distance per Turn

Thread Fit

Metric Trapezoidal Class 7H

Unified Standard Class 1A

Unified Standard Class 2A

Unified Standard Class 2B

Tensile Strength

10,000 psi to 19,999 psi

40,000 psi to 99,999 psi

100,000 psi or greater

Not Rated

Number of Thread Starts

Thread Pitch

REACH

Diameter

RoHS

Compliant with Exemptions

Hardness

Fastener Strength Rating

Finish

Speed Ratio

DFARS Specialty Metals

Compliant

Exempt

Not Compliant

Export Control Classification Number (ECCN)

Specifications Met

58 Products

Threaded Rods

Anchor, connect, or hang components in a wide variety of applications, from mounting I-beams to suspending light fixtures.

Medium-Strength Steel

Image of Product. Front orientation. Threaded Rods. Threaded Rods.

With tensile strengths from 110,000 psi to 125,000 psi, these rods are strong enough for most industrial applications, such as anchoring machinery and connecting pipe flanges. They are about twice as strong as low-strength steel rods. To avoid stripped threads during installation, make sure your nuts are also medium-strength steel.

Steel—Best for dry environments since moisture will cause these rods to rust.

	Hardness	Specs. Met		Each
Steel







	9/16"-18

	4"	125,000	ASTM Grade B7	Rockwell C35	ASTM A193	000000000	00000


	6"	125,000	ASTM Grade B7	Rockwell C35	ASTM A193	000000000	0000
	1 ft.	125,000	ASTM Grade B7	Rockwell C35	ASTM A193	000000000	00000
	2 ft.	125,000	ASTM Grade B7	Rockwell C35	ASTM A193	000000000	00000
	3 ft.	125,000	ASTM Grade B7	Rockwell C35	ASTM A193	000000000	00000
	6 ft.	125,000	ASTM Grade B7	Rockwell C35	ASTM A193	000000000	00000

High-Strength Steel

With a tensile strength of 150,000 psi, these rods are strong enough to stabilize steel frameworks and structural supports, such as I-beams. They are about 25% stronger than medium-strength steel rods. To avoid stripped threads during installation, make sure your nuts are also high-strength steel.

Steel—Best for dry environments since moisture will cause these rods to rust.

	Hardness	Specs. Met		Each
Steel







	9/16"-18

	4"	150,000	ASTM Grade BD	Rockwell C33	ASTM A354 Grade BD	000000000	000000


	6"	150,000	ASTM Grade BD	Rockwell C33	ASTM A354 Grade BD	000000000	00000
	2 ft.	150,000	ASTM Grade BD	Rockwell C33	ASTM A354 Grade BD	000000000	00000
	3 ft.	150,000	ASTM Grade BD	Rockwell C33	ASTM A354 Grade BD	000000000	00000

Low-Strength Steel

With a tensile strength of 50,000 psi or 60,000 psi, these rods are often used to suspend light fixtures, cable trays, and conduit from ceilings. They're about half the strength of medium-strength steel rods. To avoid stripped threads during installation, make sure your nuts are also low-strength steel.

Zinc-Plated Steel—The most common choice for areas with occasional exposure to moisture.

Steel—Best for dry environments since moisture will cause these rods to rust.

	Pkg. Qty.		Pkg.
Zinc-Plated Steel







	9/16"-18

	2	50,000	Rockwell B61	1	000000000	000000


	3	50,000	Rockwell B61	1	000000000	00000
	6	50,000	Rockwell B61	1	000000000	00000


	Steel







					9/16"-18

					2	50,000	Rockwell B61	1	000000000	0000


					3	50,000	Rockwell B61	1	000000000	00000
					6	50,000	Rockwell B61	1	000000000	00000

Stainless Steel

More corrosion resistant than steel rods and comparable in strength to low-strength steel.

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

	Pkg. Qty.		Pkg.
18-8 Stainless Steel







	9/16"-18

	4"	70,000	Rockwell B70	1	000000000	00000


	6"	70,000	Rockwell B70	1	000000000	0000
	1 ft.	70,000	Rockwell B70	1	000000000	00000
	2 ft.	70,000	Rockwell B70	1	000000000	00000
	3 ft.	70,000	Rockwell B70	1	000000000	00000
	6 ft.	70,000	Rockwell B70	1	000000000	00000

Flanges for Precision Acme Lead Screw Nuts

Thread onto an externally threaded acme nut to create a custom flange nut.

Black-Oxide 1117 Carbon Steel Flange—Black-oxide carbon steel flanges have mild corrosion resistance in dry environments and a dark surface color.

1215 Carbon Steel Flange—Carbon steel flanges have good machinability. However, they will rust when exposed to moisture.

303 Stainless Steel Flange—303 stainless steel flanges have good corrosion resistance.

	Flange Dia.	Flange Thk.	Bolt Circle Dia.	Flange Hardness		Each
Black-Oxide 1117 Carbon Steel Flange



	9/16"-18	1 39/64"	13/32"	1 1/8"	Brinell 135	00000000	000000


	1215 Carbon Steel Flange



			9/16"-18	1 39/64"	13/32"	1 1/8"	Not Rated	000000000	00000


			303 Stainless Steel Flange



					9/16"-18	1 39/64"	13/32"	1 1/8"	Brinell 140	0000000	00000

Precision Acme Lead Screws and Nuts

Pair with a motor in automated motion and positioning applications. A tight thread fit allows these lead screws and nuts to make accurate, repeatable starts and stops. Also known as single-start and self-locking lead screws and nuts, they have a single thread that runs the length of the screw. The nut travels only when the screw turns, so your system won’t unexpectedly move when the lead screw is at rest. To ensure compatibility, please select components that have the same thread direction, thread size, and number of thread starts.

Externally Threaded Nuts—Right-Hand Thread

Image of Product. Front orientation. Contains Annotated. Precision Lead Screws and Nuts. Precision Acme Lead Screws and Nuts, Externally Threaded Nuts—Right-Hand Thread.

Combine externally threaded nuts with a flange to create a custom flange nut.

360 Brass—360 brass nuts have excellent machinability and good corrosion resistance.

673 Bronze—932 bearing bronze and 673 bronze nuts are wear resistant. They have good machinability and fair corrosion resistance.

PET—PET plastic nuts are lightweight and corrosion resistant.

PEEK—PEEK plastic nuts handle twice as much heat as PET and acetal plastic nuts. They have good chemical resistance and excellent corrosion resistance.

Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a nut moves with one revolution of the lead screw.

								External Thread
	Thread Size	Lg.	Dia.	Thread Type	Speed Ratio	No. of Thread Starts	Travel Distance per Turn	Size	Lg.	Thread Fit	Hardness	Tensile Strength, psi	Dynamic Thrust Load Cap., lb.	Temp., ° F		Each
360 Brass



		1/4"-20	5/8"	0.688"	Acme	1:1	1	0.05"	9/16"-18	3/8"	Acme Class 2C	Brinell 141	50,000	310	—	000000000	000000


		673 Bronze



				1/4"-16	5/8"	0.688"	Acme	1:1	1	0.063"	9/16"-18	3/8"	Acme Class 2C	Brinell 70	Not Rated	Not Rated	—	000000000	00000


				3/8"-8	5/8"	0.688"	Stub Acme	1:1	1	0.125"	9/16"-18	3/8"	Acme Class 2C	Brinell 70	Not Rated	Not Rated	—	000000000	00000
				3/8"-10	5/8"	0.688"	Stub Acme	1:1	1	0.1"	9/16"-18	3/8"	Acme Class 2C	Brinell 70	Not Rated	Not Rated	—	000000000	00000
				3/8"-12	5/8"	0.688"	Acme	1:1	1	0.083"	9/16"-18	3/8"	Acme Class 2C	Brinell 70	Not Rated	Not Rated	—	000000000	00000
				3/8"-16	5/8"	0.688"	Acme	1:1	1	0.063"	9/16"-18	3/8"	Acme Class 2C	Brinell 70	Not Rated	Not Rated	—	000000000	00000


				PET



						1/4"-16	5/8"	0.688"	Acme	1:1	1	0.063"	9/16"-18	3/8"	Acme Class 2C	Not Rated	Not Rated	160	15 to 175	000000000	00000


						1/4"-20	5/8"	0.688"	Acme	1:1	1	0.05"	9/16"-18	3/8"	Acme Class 2C	Not Rated	Not Rated	160	15 to 175	000000000	00000
						3/8"-8	5/8"	0.688"	Acme	1:1	1	0.125"	9/16"-18	3/8"	Acme Class 2C	Not Rated	Not Rated	350	15 to 175	000000000	00000
						3/8"-10	5/8"	0.688"	Acme	1:1	1	0.1"	9/16"-18	3/8"	Acme Class 2C	Not Rated	Not Rated	350	15 to 175	000000000	00000
						3/8"-12	5/8"	0.688"	Acme	1:1	1	0.083"	9/16"-18	3/8"	Acme Class 2C	Not Rated	Not Rated	350	15 to 175	000000000	00000
						3/8"-16	5/8"	0.688"	Acme	1:1	1	0.063"	9/16"-18	3/8"	Acme Class 2C	Not Rated	Not Rated	350	15 to 175	000000000	00000


						PEEK



								1/4"-20	5/8"	0.688"	Acme	1:1	1	0.05"	9/16"-18	3/8"	Acme Class 2C	Not Rated	16,000	150	-40 to 525	000000000	000000

Externally Threaded Nuts—Left-Hand Thread

Combine externally threaded nuts with a flange to create a custom flange nut.

673 Bronze—932 bearing bronze and 673 bronze nuts are wear resistant. They have good machinability and fair corrosion resistance.

Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a nut moves with one revolution of the lead screw.

								External Thread
	Thread Size	Lg.	Dia.	Thread Type	Speed Ratio	No. of Thread Starts	Travel Distance per Turn	Size	Lg.	Thread Fit	Hardness	Tensile Strength	Dynamic Thrust Load Cap.		Each
673 Bronze



		1/4"-16	5/8"	0.688"	Acme	1:1	1	0.063"	9/16"-18	3/8"	Acme Class 2C	Brinell 70	Not Rated	Not Rated	000000000	000000


		3/8"-12	5/8"	0.688"	Acme	1:1	1	0.083"	9/16"-18	3/8"	Acme Class 2C	Brinell 70	Not Rated	Not Rated	000000000	00000

Flanges

Image of Attribute. Front orientation. Contains Annotated.

Thread onto an externally threaded acme nut to create a custom flange nut.

Black-Oxide 1117 Carbon Steel—Black-oxide carbon steel flanges have mild corrosion resistance in dry environments and a dark surface color.

1215 Carbon Steel—Carbon steel flanges have good machinability. However, they will rust when exposed to moisture.

303 Stainless Steel—303 stainless steel flanges have good corrosion resistance.

	Flange Dia.	Flange Thk.	Bolt Circle Dia.	Flange Hardness		Each
Black-Oxide 1117 Carbon Steel



	9/16"-18	1 39/64"	13/32"	1 1/8"	Brinell 135	00000000	000000


	1215 Carbon Steel



			9/16"-18	1 39/64"	13/32"	1 1/8"	Not Rated	000000000	00000


			303 Stainless Steel



					9/16"-18	1 39/64"	13/32"	1 1/8"	Brinell 140	0000000	00000

Fast-Travel Precision Acme Lead Screws and Nuts

Multiple thread channels (also known as thread starts) create faster linear travel than lead screws with a single thread start. The threads have a tight thread fit for accurate, repeatable starts and stops. Pair with a motor in automated motion and positioning applications. To ensure compatibility, please select components that have the same thread direction, thread size, and number of thread starts.

Externally Threaded Nuts—Right-Hand Thread

Image of Product. Front orientation. Contains Annotated. Precision Lead Screws and Nuts. Fast-Travel Precision Acme Lead Screws and Nuts, Externally Threaded Nuts—Right-Hand Thread.

Combine externally threaded nuts with a flange to create a custom flange nut.

360 Brass—360 brass nuts have excellent machinability and good corrosion resistance.

673 Bronze—932 bearing bronze and 673 bronze nuts are wear resistant. They have good machinability and fair corrosion resistance.

PET—PET plastic nuts are lightweight and corrosion resistant.

Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a nut moves with one revolution of the lead screw.

								External Thread
	Thread Size	Lg.	Dia.	Thread Type	Speed Ratio	No. of Thread Starts	Travel Distance per Turn	Size	Lg.	Thread Fit	Hardness	Tensile Strength	Dynamic Thrust Load Cap., lb.	Temp., ° F		Each
360 Brass



		1/4"-16	5/8"	0.688"	Acme	4:1	4	0.25"	9/16"-18	3/8"	Acme Class 2C	Brinell 70	Not Rated	300	—	000000000	000000


		673 Bronze



				1/4"-12	5/8"	0.688"	Stub Acme	4:1	4	0.333"	9/16"-18	3/8"	Acme Class 2C	Brinell 70	Not Rated	Not Rated	—	000000000	00000


				3/8"-8	5/8"	0.688"	Stub Acme	2:1	2	0.25"	9/16"-18	3/8"	Acme Class 2C	Brinell 70	Not Rated	Not Rated	—	000000000	00000
				3/8"-8	5/8"	0.688"	Stub Acme	4:1	4	0.5"	9/16"-18	3/8"	Acme Class 2C	Brinell 70	Not Rated	Not Rated	—	000000000	00000
				3/8"-10	5/8"	0.688"	Stub Acme	2:1	2	0.2"	9/16"-18	3/8"	Acme Class 2C	Brinell 70	Not Rated	Not Rated	—	000000000	00000
				3/8"-12	5/8"	0.688"	Acme	2:1	2	0.167"	9/16"-18	3/8"	Acme Class 2C	Brinell 70	Not Rated	Not Rated	—	000000000	00000


				PET



						1/4"-12	5/8"	0.688"	Acme	4:1	4	0.333"	9/16"-18	3/8"	Acme Class 2C	Not Rated	Not Rated	160	15 to 175	000000000	00000


						3/8"-5	5/8"	0.688"	Acme	5:1	5	1"	9/16"-18	3/8"	Acme Class 2C	Not Rated	Not Rated	250	15 to 175	000000000	00000
						3/8"-8	5/8"	0.688"	Acme	2:1	2	0.25"	9/16"-18	3/8"	Acme Class 2C	Not Rated	Not Rated	350	15 to 175	000000000	00000
						3/8"-8	5/8"	0.688"	Acme	4:1	4	0.5"	9/16"-18	3/8"	Acme Class 2C	Not Rated	Not Rated	350	15 to 175	000000000	00000
						3/8"-10	5/8"	0.688"	Acme	2:1	2	0.2"	9/16"-18	3/8"	Acme Class 2C	Not Rated	Not Rated	350	15 to 175	000000000	00000

Externally Threaded Nuts—Left-Hand Thread

Combine externally threaded nuts with a flange to create a custom flange nut.

673 Bronze—932 bearing bronze and 673 bronze nuts are wear resistant. They have good machinability and fair corrosion resistance.

Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a nut moves with one revolution of the lead screw.

								External Thread
	Thread Size	Lg.	Dia.	Thread Type	Speed Ratio	No. of Thread Starts	Travel Distance per Turn	Size	Lg.	Thread Fit	Hardness	Tensile Strength	Dynamic Thrust Load Cap.		Each
673 Bronze



		3/8"-12	5/8"	0.688"	Acme	2:1	2	0.167"	9/16"-18	3/8"	Acme Class 2C	Brinell 70	Not Rated	Not Rated	000000000	000000

Flanges

Thread onto an externally threaded acme nut to create a custom flange nut.

1215 Carbon Steel—Carbon steel flanges have good machinability. However, they will rust when exposed to moisture.

303 Stainless Steel—303 stainless steel flanges have good corrosion resistance.

	Flange Dia.	Flange Thk.	Bolt Circle Dia.	Flange Hardness		Each
1215 Carbon Steel



	9/16"-18	1 39/64"	13/32"	1 1/8"	Not Rated	000000000	000000


	303 Stainless Steel



			9/16"-18	1 39/64"	13/32"	1 1/8"	Brinell 140	0000000	00000

Coupling Nuts

Also known as extension nuts, these are commonly used to connect lengths of threaded rod and join threaded parts.

Low-Strength Steel

Rated Grade 2 or lower, these are about half as strong as medium-strength steel coupling nuts. Use them with threaded rods that have a comparable strength rating to avoid stripping threads during installation.

Zinc-Plated Steel—A step up from plain steel, the zinc plating withstands occasional exposure to moisture.

						Each
	Thread Size	Lg.	Wd.	Threading		1-9	10-49	50-Up
Zinc-Plated Steel



		9/16"-18	2 1/8"	13/16"	Fully Threaded	000000000	00000	00000	00000

Corrosion-Resistant Stainless Steel

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

							Each
	Thread Size	Lg.	Wd.	Threading	Min. Thread Lg.		1-9	10-49	50-Up
18-8 Stainless Steel



		9/16"-18	2 1/8"	13/16"	Fully Threaded	—	000000000	000000	000000	000000


		9/16"-18	4"	7/8"	Partially Threaded	3/4"	000000000	00000	00000	00000
		9/16"-18	6"	7/8"	Partially Threaded	3/4"	000000000	00000	00000	00000

Brass

Brass—With a warm, polished look, these nuts are often chosen for their appearance. Similar to 18-8 stainless steel, brass is corrosion resistant enough to stand up to wet environments. It is also softer than other metals, so it's easier to thread together.

						Each
	Thread Size	Lg.	Wd.	Threading		1-9	10-49	50-Up
Brass



		9/16"-18	2 1/8"	13/16"	Fully Threaded	000000000	000000	000000	000000

Metric Precision Lead Screws and Nuts

Pair with a motor in automated motion and positioning applications. A tight thread fit allows these lead screws and nuts to make accurate, repeatable starts and stops. Also known as single-start and self-locking lead screws and nuts, they have a single thread that runs the length of the screw. The nut travels only when the screw turns, so your system won’t unexpectedly move when the lead screw is at rest. To ensure compatibility, select components that have the same thread direction, size, and number of thread starts.

Externally Threaded Nuts—Right-Hand Thread

Image of Product. Front orientation. Contains Annotated. Precision Lead Screws and Nuts. Metric Precision Lead Screws and Nuts, Externally Threaded Nuts—Right-Hand Thread.

Manganese Bronze—Manganese bronze nuts have good strength and wear resistance.

Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a nut moves with one revolution of the lead screw.

								External Thread
	Thread Size	Lg.	Dia.	Thread Type	Speed Ratio	No. of Thread Starts	Travel Distance per Turn, mm	Size	Lg.	Thread Fit	Hardness	Tensile Strength, psi	Dynamic Thrust Load Cap., lb.	Specs. Met		Each
Manganese Bronze



		M10 × 2 mm	5/8"	0.68"	Metric Trapezoidal	1:1	1	2	9/16"-18	3/8"	Metric Trapezoidal Class 7H	Brinell 126	75,000	670	DIN 103	0000000	000000