1 1/8"-7 Threaded Rods | McMaster-Carr

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40,000 psi to 99,999 psi

100,000 psi or greater

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37 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







	1 1/8"-7

	1	125,000	ASTM Grade B7	Rockwell C35	ASTM A193	000000000	000000


	1	120,000	ASTM Grade B16	Not Rated	ASTM A193	000000000	00000
	2	125,000	ASTM Grade B7	Rockwell C35	ASTM A193	000000000	00000
	3	125,000	ASTM Grade B7	Rockwell C35	ASTM A193	000000000	00000
	3	120,000	ASTM Grade B16	Not Rated	ASTM A193	000000000	00000
	6	125,000	ASTM Grade B7	Rockwell C35	ASTM A193	000000000	000000
	6	120,000	ASTM Grade B16	Not Rated	ASTM A193	000000000	000000
	12	125,000	ASTM Grade B7	Rockwell C35	ASTM A193	000000000	000000

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.

Zinc-Yellow-Chromate-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.

	Hardness	Specs. Met		Each
Zinc-Yellow-Chromate-Plated Steel







	1 1/8"-7

	3	150,000	ASTM Grade BD	Rockwell C33	ASTM A354 Grade BD	00000000	0000000


	6	150,000	ASTM Grade BD	Rockwell C33	ASTM A354 Grade BD	00000000	000000


	Steel







					1 1/8"-7

					3	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	000000
					12	150,000	ASTM Grade BD	Rockwell C33	ASTM A354 Grade BD	000000000	000000

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.

Corrosion-Resistant Hot-Dipped Galvanized Steel—Combines the strength of steel with the rust resistance of stainless steel. These rods are an economical alternative to 18-8 stainless steel in wet and outdoor environments, but they won't hold up to salt water and chemicals. Use with hot-dipped galvanized nuts.

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

	Pkg. Qty.		Pkg.
Zinc-Plated Steel







	1 1/8"-7

	1	50,000	Rockwell B61	1	000000000	000000


	2	50,000	Rockwell B61	1	000000000	00000
	3	50,000	Rockwell B61	1	000000000	00000
	6	50,000	Rockwell B61	1	000000000	000000


	Corrosion-Resistant Hot-Dipped Galvanized Steel







					1 1/8"-7

					1	50,000	Rockwell B61	1	000000000	00000


					3	50,000	Rockwell B61	1	000000000	00000
					6	50,000	Rockwell B61	1	000000000	000000


					Steel







									1 1/8"-7

									1	50,000	Rockwell B61	1	000000000	00000


									2	50,000	Rockwell B61	1	000000000	00000
									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.

Highly-Corrosion-Resistant 316 Stainless Steel—Superior to 18-8 stainless steel, these rods won't degrade when exposed to harsh weather, salt water, and most chemicals.

	Pkg. Qty.		Pkg.
18-8 Stainless Steel







	1 1/8"-7

	1	70,000	Rockwell B70	1	000000000	000000


	2	70,000	Rockwell B70	1	000000000	00000
	3	70,000	Rockwell B70	1	000000000	000000
	6	70,000	Rockwell B70	1	000000000	000000


	Highly-Corrosion-Resistant 316 Stainless Steel







					1 1/8"-7

					1	70,000	Rockwell B70	1	000000000	00000


					3	70,000	Rockwell B70	1	000000000	000000

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.

Hot-Dipped Galvanized Steel—Combines the strength of steel with the rust resistance of stainless steel. These nuts are an economical alternative to 18-8 stainless steel in wet and outdoor environments, but they won't hold up to salt water and chemicals. Use with other hot-dipped galvanized fasteners to ensure the threads mate tightly.

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



		1 1/8"-7	3"	1 1/2"	Fully Threaded	—	000000000	000000	000000


		1 1/8"-7	7 1/2"	1 3/4"	Partially Threaded	3 5/8"	000000000	00000	00000


		Hot-Dipped Galvanized Steel



				1 1/8"-7	3"	1 1/2"	Fully Threaded	—	000000000	00000	00000

Medium-Strength Steel

These Grade 5 or Class 8 nuts are about twice as strong as low-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.	Fastener Strength Grade/Class	Threading		1-9	10-Up
Zinc-Plated Steel



		1 1/8"-7	3"	1 1/2"	SAE Grade 5	Fully Threaded	000000000	000000	000000

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.

Highly-Corrosion-Resistant 316 Stainless Steel—The most corrosion-resistant stainless steel coupling nuts we offer, these hold up in just about any environment. They won't degrade from exposure to weather, salt water, and most chemicals.

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



		1 1/8"-7	3"	1 1/2"	Fully Threaded	000000000	000000	000000


		Highly-Corrosion-Resistant 316 Stainless Steel



				1 1/8"-7	3"	1 1/2"	Fully Threaded	000000000	000000	000000

Left-Hand to Right-Hand Female Hex Thread Adapters

Often called sleeve nuts, these thread adapters fasten parts with right-hand threads to parts with left-hand threads.

Zinc-Plated Steel—Zinc-plated steel adapters are strong and corrosion resistant.

			Thread Lg.		Thread Fit		Hex				Each
	Thread Size (A)	Thread Size (B)	(A)	(B)	(A)	(B)	Size	Length	Hardness		1-9	10-Up
Zinc-Plated Steel



		1 1/8"-7	1 1/8"-7	3 1/2"	3 1/2"	Unified Standard Class 2B	Unified Standard Class 2B	1 3/4"	7 1/2"	Rockwell B65	000000000	000000	000000